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-rw-r--r--net/mac80211/mlme.c4299
1 files changed, 4299 insertions, 0 deletions
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
new file mode 100644
index 000000000000..6b75cb6c6300
--- /dev/null
+++ b/net/mac80211/mlme.c
@@ -0,0 +1,4299 @@
1/*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14/* TODO:
15 * order BSS list by RSSI(?) ("quality of AP")
16 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
17 * SSID)
18 */
19#include <linux/delay.h>
20#include <linux/if_ether.h>
21#include <linux/skbuff.h>
22#include <linux/netdevice.h>
23#include <linux/if_arp.h>
24#include <linux/wireless.h>
25#include <linux/random.h>
26#include <linux/etherdevice.h>
27#include <linux/rtnetlink.h>
28#include <net/iw_handler.h>
29#include <asm/types.h>
30
31#include <net/mac80211.h>
32#include "ieee80211_i.h"
33#include "rate.h"
34#include "led.h"
35#include "mesh.h"
36
37#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
38#define IEEE80211_AUTH_MAX_TRIES 3
39#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40#define IEEE80211_ASSOC_MAX_TRIES 3
41#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
42#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
43#define IEEE80211_PROBE_INTERVAL (60 * HZ)
44#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
45#define IEEE80211_SCAN_INTERVAL (2 * HZ)
46#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
47#define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
48
49#define IEEE80211_PROBE_DELAY (HZ / 33)
50#define IEEE80211_CHANNEL_TIME (HZ / 33)
51#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
52#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
53#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
54#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
55#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
56
57#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
58
59
60#define ERP_INFO_USE_PROTECTION BIT(1)
61
62/* mgmt header + 1 byte action code */
63#define IEEE80211_MIN_ACTION_SIZE (24 + 1)
64
65#define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
66#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
67#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
68#define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
69#define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
70
71/* next values represent the buffer size for A-MPDU frame.
72 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
73#define IEEE80211_MIN_AMPDU_BUF 0x8
74#define IEEE80211_MAX_AMPDU_BUF 0x40
75
76static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
77 u8 *ssid, size_t ssid_len);
78static struct ieee80211_sta_bss *
79ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
80 u8 *ssid, u8 ssid_len);
81static void ieee80211_rx_bss_put(struct net_device *dev,
82 struct ieee80211_sta_bss *bss);
83static int ieee80211_sta_find_ibss(struct net_device *dev,
84 struct ieee80211_if_sta *ifsta);
85static int ieee80211_sta_wep_configured(struct net_device *dev);
86static int ieee80211_sta_start_scan(struct net_device *dev,
87 u8 *ssid, size_t ssid_len);
88static int ieee80211_sta_config_auth(struct net_device *dev,
89 struct ieee80211_if_sta *ifsta);
90
91
92void ieee802_11_parse_elems(u8 *start, size_t len,
93 struct ieee802_11_elems *elems)
94{
95 size_t left = len;
96 u8 *pos = start;
97
98 memset(elems, 0, sizeof(*elems));
99
100 while (left >= 2) {
101 u8 id, elen;
102
103 id = *pos++;
104 elen = *pos++;
105 left -= 2;
106
107 if (elen > left)
108 return;
109
110 switch (id) {
111 case WLAN_EID_SSID:
112 elems->ssid = pos;
113 elems->ssid_len = elen;
114 break;
115 case WLAN_EID_SUPP_RATES:
116 elems->supp_rates = pos;
117 elems->supp_rates_len = elen;
118 break;
119 case WLAN_EID_FH_PARAMS:
120 elems->fh_params = pos;
121 elems->fh_params_len = elen;
122 break;
123 case WLAN_EID_DS_PARAMS:
124 elems->ds_params = pos;
125 elems->ds_params_len = elen;
126 break;
127 case WLAN_EID_CF_PARAMS:
128 elems->cf_params = pos;
129 elems->cf_params_len = elen;
130 break;
131 case WLAN_EID_TIM:
132 elems->tim = pos;
133 elems->tim_len = elen;
134 break;
135 case WLAN_EID_IBSS_PARAMS:
136 elems->ibss_params = pos;
137 elems->ibss_params_len = elen;
138 break;
139 case WLAN_EID_CHALLENGE:
140 elems->challenge = pos;
141 elems->challenge_len = elen;
142 break;
143 case WLAN_EID_WPA:
144 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
145 pos[2] == 0xf2) {
146 /* Microsoft OUI (00:50:F2) */
147 if (pos[3] == 1) {
148 /* OUI Type 1 - WPA IE */
149 elems->wpa = pos;
150 elems->wpa_len = elen;
151 } else if (elen >= 5 && pos[3] == 2) {
152 if (pos[4] == 0) {
153 elems->wmm_info = pos;
154 elems->wmm_info_len = elen;
155 } else if (pos[4] == 1) {
156 elems->wmm_param = pos;
157 elems->wmm_param_len = elen;
158 }
159 }
160 }
161 break;
162 case WLAN_EID_RSN:
163 elems->rsn = pos;
164 elems->rsn_len = elen;
165 break;
166 case WLAN_EID_ERP_INFO:
167 elems->erp_info = pos;
168 elems->erp_info_len = elen;
169 break;
170 case WLAN_EID_EXT_SUPP_RATES:
171 elems->ext_supp_rates = pos;
172 elems->ext_supp_rates_len = elen;
173 break;
174 case WLAN_EID_HT_CAPABILITY:
175 elems->ht_cap_elem = pos;
176 elems->ht_cap_elem_len = elen;
177 break;
178 case WLAN_EID_HT_EXTRA_INFO:
179 elems->ht_info_elem = pos;
180 elems->ht_info_elem_len = elen;
181 break;
182 case WLAN_EID_MESH_ID:
183 elems->mesh_id = pos;
184 elems->mesh_id_len = elen;
185 break;
186 case WLAN_EID_MESH_CONFIG:
187 elems->mesh_config = pos;
188 elems->mesh_config_len = elen;
189 break;
190 case WLAN_EID_PEER_LINK:
191 elems->peer_link = pos;
192 elems->peer_link_len = elen;
193 break;
194 case WLAN_EID_PREQ:
195 elems->preq = pos;
196 elems->preq_len = elen;
197 break;
198 case WLAN_EID_PREP:
199 elems->prep = pos;
200 elems->prep_len = elen;
201 break;
202 case WLAN_EID_PERR:
203 elems->perr = pos;
204 elems->perr_len = elen;
205 break;
206 default:
207 break;
208 }
209
210 left -= elen;
211 pos += elen;
212 }
213}
214
215
216static int ecw2cw(int ecw)
217{
218 return (1 << ecw) - 1;
219}
220
221
222static void ieee80211_sta_def_wmm_params(struct net_device *dev,
223 struct ieee80211_sta_bss *bss,
224 int ibss)
225{
226 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
227 struct ieee80211_local *local = sdata->local;
228 int i, have_higher_than_11mbit = 0;
229
230
231 /* cf. IEEE 802.11 9.2.12 */
232 for (i = 0; i < bss->supp_rates_len; i++)
233 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
234 have_higher_than_11mbit = 1;
235
236 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
237 have_higher_than_11mbit)
238 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
239 else
240 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
241
242
243 if (local->ops->conf_tx) {
244 struct ieee80211_tx_queue_params qparam;
245
246 memset(&qparam, 0, sizeof(qparam));
247
248 qparam.aifs = 2;
249
250 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
251 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
252 qparam.cw_min = 31;
253 else
254 qparam.cw_min = 15;
255
256 qparam.cw_max = 1023;
257 qparam.txop = 0;
258
259 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
260 local->ops->conf_tx(local_to_hw(local),
261 i + IEEE80211_TX_QUEUE_DATA0,
262 &qparam);
263
264 if (ibss) {
265 /* IBSS uses different parameters for Beacon sending */
266 qparam.cw_min++;
267 qparam.cw_min *= 2;
268 qparam.cw_min--;
269 local->ops->conf_tx(local_to_hw(local),
270 IEEE80211_TX_QUEUE_BEACON, &qparam);
271 }
272 }
273}
274
275static void ieee80211_sta_wmm_params(struct net_device *dev,
276 struct ieee80211_if_sta *ifsta,
277 u8 *wmm_param, size_t wmm_param_len)
278{
279 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
280 struct ieee80211_tx_queue_params params;
281 size_t left;
282 int count;
283 u8 *pos;
284
285 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
286 return;
287 count = wmm_param[6] & 0x0f;
288 if (count == ifsta->wmm_last_param_set)
289 return;
290 ifsta->wmm_last_param_set = count;
291
292 pos = wmm_param + 8;
293 left = wmm_param_len - 8;
294
295 memset(&params, 0, sizeof(params));
296
297 if (!local->ops->conf_tx)
298 return;
299
300 local->wmm_acm = 0;
301 for (; left >= 4; left -= 4, pos += 4) {
302 int aci = (pos[0] >> 5) & 0x03;
303 int acm = (pos[0] >> 4) & 0x01;
304 int queue;
305
306 switch (aci) {
307 case 1:
308 queue = IEEE80211_TX_QUEUE_DATA3;
309 if (acm) {
310 local->wmm_acm |= BIT(0) | BIT(3);
311 }
312 break;
313 case 2:
314 queue = IEEE80211_TX_QUEUE_DATA1;
315 if (acm) {
316 local->wmm_acm |= BIT(4) | BIT(5);
317 }
318 break;
319 case 3:
320 queue = IEEE80211_TX_QUEUE_DATA0;
321 if (acm) {
322 local->wmm_acm |= BIT(6) | BIT(7);
323 }
324 break;
325 case 0:
326 default:
327 queue = IEEE80211_TX_QUEUE_DATA2;
328 if (acm) {
329 local->wmm_acm |= BIT(1) | BIT(2);
330 }
331 break;
332 }
333
334 params.aifs = pos[0] & 0x0f;
335 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
336 params.cw_min = ecw2cw(pos[1] & 0x0f);
337 params.txop = pos[2] | (pos[3] << 8);
338#ifdef CONFIG_MAC80211_DEBUG
339 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
340 "cWmin=%d cWmax=%d txop=%d\n",
341 dev->name, queue, aci, acm, params.aifs, params.cw_min,
342 params.cw_max, params.txop);
343#endif
344 /* TODO: handle ACM (block TX, fallback to next lowest allowed
345 * AC for now) */
346 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
347 printk(KERN_DEBUG "%s: failed to set TX queue "
348 "parameters for queue %d\n", dev->name, queue);
349 }
350 }
351}
352
353static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
354 bool use_protection,
355 bool use_short_preamble)
356{
357 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
358 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
359 DECLARE_MAC_BUF(mac);
360 u32 changed = 0;
361
362 if (use_protection != bss_conf->use_cts_prot) {
363 if (net_ratelimit()) {
364 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
365 "%s)\n",
366 sdata->dev->name,
367 use_protection ? "enabled" : "disabled",
368 print_mac(mac, ifsta->bssid));
369 }
370 bss_conf->use_cts_prot = use_protection;
371 changed |= BSS_CHANGED_ERP_CTS_PROT;
372 }
373
374 if (use_short_preamble != bss_conf->use_short_preamble) {
375 if (net_ratelimit()) {
376 printk(KERN_DEBUG "%s: switched to %s barker preamble"
377 " (BSSID=%s)\n",
378 sdata->dev->name,
379 use_short_preamble ? "short" : "long",
380 print_mac(mac, ifsta->bssid));
381 }
382 bss_conf->use_short_preamble = use_short_preamble;
383 changed |= BSS_CHANGED_ERP_PREAMBLE;
384 }
385
386 return changed;
387}
388
389static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
390 u8 erp_value)
391{
392 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
393 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
394
395 return ieee80211_handle_protect_preamb(sdata,
396 use_protection, use_short_preamble);
397}
398
399static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
400 struct ieee80211_sta_bss *bss)
401{
402 u32 changed = 0;
403
404 if (bss->has_erp_value)
405 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
406 else {
407 u16 capab = bss->capability;
408 changed |= ieee80211_handle_protect_preamb(sdata, false,
409 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
410 }
411
412 return changed;
413}
414
415int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
416 struct ieee80211_ht_info *ht_info)
417{
418
419 if (ht_info == NULL)
420 return -EINVAL;
421
422 memset(ht_info, 0, sizeof(*ht_info));
423
424 if (ht_cap_ie) {
425 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
426
427 ht_info->ht_supported = 1;
428 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
429 ht_info->ampdu_factor =
430 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
431 ht_info->ampdu_density =
432 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
433 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
434 } else
435 ht_info->ht_supported = 0;
436
437 return 0;
438}
439
440int ieee80211_ht_addt_info_ie_to_ht_bss_info(
441 struct ieee80211_ht_addt_info *ht_add_info_ie,
442 struct ieee80211_ht_bss_info *bss_info)
443{
444 if (bss_info == NULL)
445 return -EINVAL;
446
447 memset(bss_info, 0, sizeof(*bss_info));
448
449 if (ht_add_info_ie) {
450 u16 op_mode;
451 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
452
453 bss_info->primary_channel = ht_add_info_ie->control_chan;
454 bss_info->bss_cap = ht_add_info_ie->ht_param;
455 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
456 }
457
458 return 0;
459}
460
461static void ieee80211_sta_send_associnfo(struct net_device *dev,
462 struct ieee80211_if_sta *ifsta)
463{
464 char *buf;
465 size_t len;
466 int i;
467 union iwreq_data wrqu;
468
469 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
470 return;
471
472 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
473 ifsta->assocresp_ies_len), GFP_KERNEL);
474 if (!buf)
475 return;
476
477 len = sprintf(buf, "ASSOCINFO(");
478 if (ifsta->assocreq_ies) {
479 len += sprintf(buf + len, "ReqIEs=");
480 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
481 len += sprintf(buf + len, "%02x",
482 ifsta->assocreq_ies[i]);
483 }
484 }
485 if (ifsta->assocresp_ies) {
486 if (ifsta->assocreq_ies)
487 len += sprintf(buf + len, " ");
488 len += sprintf(buf + len, "RespIEs=");
489 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
490 len += sprintf(buf + len, "%02x",
491 ifsta->assocresp_ies[i]);
492 }
493 }
494 len += sprintf(buf + len, ")");
495
496 if (len > IW_CUSTOM_MAX) {
497 len = sprintf(buf, "ASSOCRESPIE=");
498 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
499 len += sprintf(buf + len, "%02x",
500 ifsta->assocresp_ies[i]);
501 }
502 }
503
504 memset(&wrqu, 0, sizeof(wrqu));
505 wrqu.data.length = len;
506 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
507
508 kfree(buf);
509}
510
511
512static void ieee80211_set_associated(struct net_device *dev,
513 struct ieee80211_if_sta *ifsta,
514 bool assoc)
515{
516 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
517 struct ieee80211_local *local = sdata->local;
518 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
519 union iwreq_data wrqu;
520 u32 changed = BSS_CHANGED_ASSOC;
521
522 if (assoc) {
523 struct ieee80211_sta_bss *bss;
524
525 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
526
527 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
528 return;
529
530 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
531 conf->channel->center_freq,
532 ifsta->ssid, ifsta->ssid_len);
533 if (bss) {
534 /* set timing information */
535 sdata->bss_conf.beacon_int = bss->beacon_int;
536 sdata->bss_conf.timestamp = bss->timestamp;
537
538 changed |= ieee80211_handle_bss_capability(sdata, bss);
539
540 ieee80211_rx_bss_put(dev, bss);
541 }
542
543 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
544 changed |= BSS_CHANGED_HT;
545 sdata->bss_conf.assoc_ht = 1;
546 sdata->bss_conf.ht_conf = &conf->ht_conf;
547 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
548 }
549
550 netif_carrier_on(dev);
551 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
552 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
553 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
554 ieee80211_sta_send_associnfo(dev, ifsta);
555 } else {
556 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
557 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
558 netif_carrier_off(dev);
559 ieee80211_reset_erp_info(dev);
560
561 sdata->bss_conf.assoc_ht = 0;
562 sdata->bss_conf.ht_conf = NULL;
563 sdata->bss_conf.ht_bss_conf = NULL;
564
565 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
566 }
567 ifsta->last_probe = jiffies;
568 ieee80211_led_assoc(local, assoc);
569
570 sdata->bss_conf.assoc = assoc;
571 ieee80211_bss_info_change_notify(sdata, changed);
572 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
573 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
574}
575
576static void ieee80211_set_disassoc(struct net_device *dev,
577 struct ieee80211_if_sta *ifsta, int deauth)
578{
579 if (deauth)
580 ifsta->auth_tries = 0;
581 ifsta->assoc_tries = 0;
582 ieee80211_set_associated(dev, ifsta, 0);
583}
584
585void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
586 int encrypt)
587{
588 struct ieee80211_sub_if_data *sdata;
589 struct ieee80211_tx_packet_data *pkt_data;
590
591 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
592 skb->dev = sdata->local->mdev;
593 skb_set_mac_header(skb, 0);
594 skb_set_network_header(skb, 0);
595 skb_set_transport_header(skb, 0);
596
597 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
598 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
599 pkt_data->ifindex = sdata->dev->ifindex;
600 if (!encrypt)
601 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
602
603 dev_queue_xmit(skb);
604}
605
606
607static void ieee80211_send_auth(struct net_device *dev,
608 struct ieee80211_if_sta *ifsta,
609 int transaction, u8 *extra, size_t extra_len,
610 int encrypt)
611{
612 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
613 struct sk_buff *skb;
614 struct ieee80211_mgmt *mgmt;
615
616 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
617 sizeof(*mgmt) + 6 + extra_len);
618 if (!skb) {
619 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
620 "frame\n", dev->name);
621 return;
622 }
623 skb_reserve(skb, local->hw.extra_tx_headroom);
624
625 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
626 memset(mgmt, 0, 24 + 6);
627 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
628 IEEE80211_STYPE_AUTH);
629 if (encrypt)
630 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
631 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
632 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
633 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
634 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
635 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
636 ifsta->auth_transaction = transaction + 1;
637 mgmt->u.auth.status_code = cpu_to_le16(0);
638 if (extra)
639 memcpy(skb_put(skb, extra_len), extra, extra_len);
640
641 ieee80211_sta_tx(dev, skb, encrypt);
642}
643
644
645static void ieee80211_authenticate(struct net_device *dev,
646 struct ieee80211_if_sta *ifsta)
647{
648 DECLARE_MAC_BUF(mac);
649
650 ifsta->auth_tries++;
651 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
652 printk(KERN_DEBUG "%s: authentication with AP %s"
653 " timed out\n",
654 dev->name, print_mac(mac, ifsta->bssid));
655 ifsta->state = IEEE80211_DISABLED;
656 return;
657 }
658
659 ifsta->state = IEEE80211_AUTHENTICATE;
660 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
661 dev->name, print_mac(mac, ifsta->bssid));
662
663 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
664
665 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
666}
667
668
669static void ieee80211_send_assoc(struct net_device *dev,
670 struct ieee80211_if_sta *ifsta)
671{
672 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
673 struct sk_buff *skb;
674 struct ieee80211_mgmt *mgmt;
675 u8 *pos, *ies;
676 int i, len;
677 u16 capab;
678 struct ieee80211_sta_bss *bss;
679 int wmm = 0;
680 struct ieee80211_supported_band *sband;
681
682 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
683 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
684 ifsta->ssid_len);
685 if (!skb) {
686 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
687 "frame\n", dev->name);
688 return;
689 }
690 skb_reserve(skb, local->hw.extra_tx_headroom);
691
692 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
693
694 capab = ifsta->capab;
695
696 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
697 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
698 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
699 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
700 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
701 }
702
703 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
704 local->hw.conf.channel->center_freq,
705 ifsta->ssid, ifsta->ssid_len);
706 if (bss) {
707 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
708 capab |= WLAN_CAPABILITY_PRIVACY;
709 if (bss->wmm_ie) {
710 wmm = 1;
711 }
712 ieee80211_rx_bss_put(dev, bss);
713 }
714
715 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
716 memset(mgmt, 0, 24);
717 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
718 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
719 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
720
721 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
722 skb_put(skb, 10);
723 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
724 IEEE80211_STYPE_REASSOC_REQ);
725 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
726 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
727 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
728 ETH_ALEN);
729 } else {
730 skb_put(skb, 4);
731 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
732 IEEE80211_STYPE_ASSOC_REQ);
733 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
734 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
735 }
736
737 /* SSID */
738 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
739 *pos++ = WLAN_EID_SSID;
740 *pos++ = ifsta->ssid_len;
741 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
742
743 len = sband->n_bitrates;
744 if (len > 8)
745 len = 8;
746 pos = skb_put(skb, len + 2);
747 *pos++ = WLAN_EID_SUPP_RATES;
748 *pos++ = len;
749 for (i = 0; i < len; i++) {
750 int rate = sband->bitrates[i].bitrate;
751 *pos++ = (u8) (rate / 5);
752 }
753
754 if (sband->n_bitrates > len) {
755 pos = skb_put(skb, sband->n_bitrates - len + 2);
756 *pos++ = WLAN_EID_EXT_SUPP_RATES;
757 *pos++ = sband->n_bitrates - len;
758 for (i = len; i < sband->n_bitrates; i++) {
759 int rate = sband->bitrates[i].bitrate;
760 *pos++ = (u8) (rate / 5);
761 }
762 }
763
764 if (ifsta->extra_ie) {
765 pos = skb_put(skb, ifsta->extra_ie_len);
766 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
767 }
768
769 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
770 pos = skb_put(skb, 9);
771 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
772 *pos++ = 7; /* len */
773 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
774 *pos++ = 0x50;
775 *pos++ = 0xf2;
776 *pos++ = 2; /* WME */
777 *pos++ = 0; /* WME info */
778 *pos++ = 1; /* WME ver */
779 *pos++ = 0;
780 }
781 /* wmm support is a must to HT */
782 if (wmm && sband->ht_info.ht_supported) {
783 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
784 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
785 *pos++ = WLAN_EID_HT_CAPABILITY;
786 *pos++ = sizeof(struct ieee80211_ht_cap);
787 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
788 memcpy(pos, &tmp, sizeof(u16));
789 pos += sizeof(u16);
790 /* TODO: needs a define here for << 2 */
791 *pos++ = sband->ht_info.ampdu_factor |
792 (sband->ht_info.ampdu_density << 2);
793 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
794 }
795
796 kfree(ifsta->assocreq_ies);
797 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
798 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
799 if (ifsta->assocreq_ies)
800 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
801
802 ieee80211_sta_tx(dev, skb, 0);
803}
804
805
806static void ieee80211_send_deauth(struct net_device *dev,
807 struct ieee80211_if_sta *ifsta, u16 reason)
808{
809 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
810 struct sk_buff *skb;
811 struct ieee80211_mgmt *mgmt;
812
813 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
814 if (!skb) {
815 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
816 "frame\n", dev->name);
817 return;
818 }
819 skb_reserve(skb, local->hw.extra_tx_headroom);
820
821 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
822 memset(mgmt, 0, 24);
823 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
824 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
825 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
826 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
827 IEEE80211_STYPE_DEAUTH);
828 skb_put(skb, 2);
829 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
830
831 ieee80211_sta_tx(dev, skb, 0);
832}
833
834
835static void ieee80211_send_disassoc(struct net_device *dev,
836 struct ieee80211_if_sta *ifsta, u16 reason)
837{
838 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
839 struct sk_buff *skb;
840 struct ieee80211_mgmt *mgmt;
841
842 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
843 if (!skb) {
844 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
845 "frame\n", dev->name);
846 return;
847 }
848 skb_reserve(skb, local->hw.extra_tx_headroom);
849
850 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
851 memset(mgmt, 0, 24);
852 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
853 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
854 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
855 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
856 IEEE80211_STYPE_DISASSOC);
857 skb_put(skb, 2);
858 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
859
860 ieee80211_sta_tx(dev, skb, 0);
861}
862
863
864static int ieee80211_privacy_mismatch(struct net_device *dev,
865 struct ieee80211_if_sta *ifsta)
866{
867 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
868 struct ieee80211_sta_bss *bss;
869 int bss_privacy;
870 int wep_privacy;
871 int privacy_invoked;
872
873 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
874 return 0;
875
876 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
877 local->hw.conf.channel->center_freq,
878 ifsta->ssid, ifsta->ssid_len);
879 if (!bss)
880 return 0;
881
882 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
883 wep_privacy = !!ieee80211_sta_wep_configured(dev);
884 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
885
886 ieee80211_rx_bss_put(dev, bss);
887
888 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
889 return 0;
890
891 return 1;
892}
893
894
895static void ieee80211_associate(struct net_device *dev,
896 struct ieee80211_if_sta *ifsta)
897{
898 DECLARE_MAC_BUF(mac);
899
900 ifsta->assoc_tries++;
901 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
902 printk(KERN_DEBUG "%s: association with AP %s"
903 " timed out\n",
904 dev->name, print_mac(mac, ifsta->bssid));
905 ifsta->state = IEEE80211_DISABLED;
906 return;
907 }
908
909 ifsta->state = IEEE80211_ASSOCIATE;
910 printk(KERN_DEBUG "%s: associate with AP %s\n",
911 dev->name, print_mac(mac, ifsta->bssid));
912 if (ieee80211_privacy_mismatch(dev, ifsta)) {
913 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
914 "mixed-cell disabled - abort association\n", dev->name);
915 ifsta->state = IEEE80211_DISABLED;
916 return;
917 }
918
919 ieee80211_send_assoc(dev, ifsta);
920
921 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
922}
923
924
925static void ieee80211_associated(struct net_device *dev,
926 struct ieee80211_if_sta *ifsta)
927{
928 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
929 struct sta_info *sta;
930 int disassoc;
931 DECLARE_MAC_BUF(mac);
932
933 /* TODO: start monitoring current AP signal quality and number of
934 * missed beacons. Scan other channels every now and then and search
935 * for better APs. */
936 /* TODO: remove expired BSSes */
937
938 ifsta->state = IEEE80211_ASSOCIATED;
939
940 rcu_read_lock();
941
942 sta = sta_info_get(local, ifsta->bssid);
943 if (!sta) {
944 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
945 dev->name, print_mac(mac, ifsta->bssid));
946 disassoc = 1;
947 } else {
948 disassoc = 0;
949 if (time_after(jiffies,
950 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
951 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
952 printk(KERN_DEBUG "%s: No ProbeResp from "
953 "current AP %s - assume out of "
954 "range\n",
955 dev->name, print_mac(mac, ifsta->bssid));
956 disassoc = 1;
957 sta_info_unlink(&sta);
958 } else
959 ieee80211_send_probe_req(dev, ifsta->bssid,
960 local->scan_ssid,
961 local->scan_ssid_len);
962 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
963 } else {
964 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
965 if (time_after(jiffies, ifsta->last_probe +
966 IEEE80211_PROBE_INTERVAL)) {
967 ifsta->last_probe = jiffies;
968 ieee80211_send_probe_req(dev, ifsta->bssid,
969 ifsta->ssid,
970 ifsta->ssid_len);
971 }
972 }
973 }
974
975 rcu_read_unlock();
976
977 if (disassoc && sta)
978 sta_info_destroy(sta);
979
980 if (disassoc) {
981 ifsta->state = IEEE80211_DISABLED;
982 ieee80211_set_associated(dev, ifsta, 0);
983 } else {
984 mod_timer(&ifsta->timer, jiffies +
985 IEEE80211_MONITORING_INTERVAL);
986 }
987}
988
989
990static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
991 u8 *ssid, size_t ssid_len)
992{
993 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
994 struct ieee80211_supported_band *sband;
995 struct sk_buff *skb;
996 struct ieee80211_mgmt *mgmt;
997 u8 *pos, *supp_rates, *esupp_rates = NULL;
998 int i;
999
1000 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1001 if (!skb) {
1002 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1003 "request\n", dev->name);
1004 return;
1005 }
1006 skb_reserve(skb, local->hw.extra_tx_headroom);
1007
1008 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1009 memset(mgmt, 0, 24);
1010 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1011 IEEE80211_STYPE_PROBE_REQ);
1012 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1013 if (dst) {
1014 memcpy(mgmt->da, dst, ETH_ALEN);
1015 memcpy(mgmt->bssid, dst, ETH_ALEN);
1016 } else {
1017 memset(mgmt->da, 0xff, ETH_ALEN);
1018 memset(mgmt->bssid, 0xff, ETH_ALEN);
1019 }
1020 pos = skb_put(skb, 2 + ssid_len);
1021 *pos++ = WLAN_EID_SSID;
1022 *pos++ = ssid_len;
1023 memcpy(pos, ssid, ssid_len);
1024
1025 supp_rates = skb_put(skb, 2);
1026 supp_rates[0] = WLAN_EID_SUPP_RATES;
1027 supp_rates[1] = 0;
1028 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1029
1030 for (i = 0; i < sband->n_bitrates; i++) {
1031 struct ieee80211_rate *rate = &sband->bitrates[i];
1032 if (esupp_rates) {
1033 pos = skb_put(skb, 1);
1034 esupp_rates[1]++;
1035 } else if (supp_rates[1] == 8) {
1036 esupp_rates = skb_put(skb, 3);
1037 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1038 esupp_rates[1] = 1;
1039 pos = &esupp_rates[2];
1040 } else {
1041 pos = skb_put(skb, 1);
1042 supp_rates[1]++;
1043 }
1044 *pos = rate->bitrate / 5;
1045 }
1046
1047 ieee80211_sta_tx(dev, skb, 0);
1048}
1049
1050
1051static int ieee80211_sta_wep_configured(struct net_device *dev)
1052{
1053 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1054 if (!sdata || !sdata->default_key ||
1055 sdata->default_key->conf.alg != ALG_WEP)
1056 return 0;
1057 return 1;
1058}
1059
1060
1061static void ieee80211_auth_completed(struct net_device *dev,
1062 struct ieee80211_if_sta *ifsta)
1063{
1064 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1065 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1066 ieee80211_associate(dev, ifsta);
1067}
1068
1069
1070static void ieee80211_auth_challenge(struct net_device *dev,
1071 struct ieee80211_if_sta *ifsta,
1072 struct ieee80211_mgmt *mgmt,
1073 size_t len)
1074{
1075 u8 *pos;
1076 struct ieee802_11_elems elems;
1077
1078 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1079 pos = mgmt->u.auth.variable;
1080 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1081 if (!elems.challenge) {
1082 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1083 "frame\n", dev->name);
1084 return;
1085 }
1086 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1087 elems.challenge_len + 2, 1);
1088}
1089
1090static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1091 u8 dialog_token, u16 status, u16 policy,
1092 u16 buf_size, u16 timeout)
1093{
1094 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1095 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1096 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1097 struct sk_buff *skb;
1098 struct ieee80211_mgmt *mgmt;
1099 u16 capab;
1100
1101 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1102 sizeof(mgmt->u.action.u.addba_resp));
1103 if (!skb) {
1104 printk(KERN_DEBUG "%s: failed to allocate buffer "
1105 "for addba resp frame\n", dev->name);
1106 return;
1107 }
1108
1109 skb_reserve(skb, local->hw.extra_tx_headroom);
1110 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1111 memset(mgmt, 0, 24);
1112 memcpy(mgmt->da, da, ETH_ALEN);
1113 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1114 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1115 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1116 else
1117 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1118 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1119 IEEE80211_STYPE_ACTION);
1120
1121 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1122 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1123 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1124 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1125
1126 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1127 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1128 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1129
1130 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1131 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1132 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1133
1134 ieee80211_sta_tx(dev, skb, 0);
1135
1136 return;
1137}
1138
1139void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1140 u16 tid, u8 dialog_token, u16 start_seq_num,
1141 u16 agg_size, u16 timeout)
1142{
1143 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1144 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1145 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1146 struct sk_buff *skb;
1147 struct ieee80211_mgmt *mgmt;
1148 u16 capab;
1149
1150 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1151 sizeof(mgmt->u.action.u.addba_req));
1152
1153
1154 if (!skb) {
1155 printk(KERN_ERR "%s: failed to allocate buffer "
1156 "for addba request frame\n", dev->name);
1157 return;
1158 }
1159 skb_reserve(skb, local->hw.extra_tx_headroom);
1160 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1161 memset(mgmt, 0, 24);
1162 memcpy(mgmt->da, da, ETH_ALEN);
1163 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1164 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1165 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1166 else
1167 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1168
1169 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1170 IEEE80211_STYPE_ACTION);
1171
1172 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1173
1174 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1175 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1176
1177 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1178 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1179 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1180 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1181
1182 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1183
1184 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1185 mgmt->u.action.u.addba_req.start_seq_num =
1186 cpu_to_le16(start_seq_num << 4);
1187
1188 ieee80211_sta_tx(dev, skb, 0);
1189}
1190
1191static void ieee80211_sta_process_addba_request(struct net_device *dev,
1192 struct ieee80211_mgmt *mgmt,
1193 size_t len)
1194{
1195 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1196 struct ieee80211_hw *hw = &local->hw;
1197 struct ieee80211_conf *conf = &hw->conf;
1198 struct sta_info *sta;
1199 struct tid_ampdu_rx *tid_agg_rx;
1200 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1201 u8 dialog_token;
1202 int ret = -EOPNOTSUPP;
1203 DECLARE_MAC_BUF(mac);
1204
1205 rcu_read_lock();
1206
1207 sta = sta_info_get(local, mgmt->sa);
1208 if (!sta) {
1209 rcu_read_unlock();
1210 return;
1211 }
1212
1213 /* extract session parameters from addba request frame */
1214 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1215 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1216 start_seq_num =
1217 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1218
1219 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1220 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1221 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1222 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1223
1224 status = WLAN_STATUS_REQUEST_DECLINED;
1225
1226 /* sanity check for incoming parameters:
1227 * check if configuration can support the BA policy
1228 * and if buffer size does not exceeds max value */
1229 if (((ba_policy != 1)
1230 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1231 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1232 status = WLAN_STATUS_INVALID_QOS_PARAM;
1233#ifdef CONFIG_MAC80211_HT_DEBUG
1234 if (net_ratelimit())
1235 printk(KERN_DEBUG "AddBA Req with bad params from "
1236 "%s on tid %u. policy %d, buffer size %d\n",
1237 print_mac(mac, mgmt->sa), tid, ba_policy,
1238 buf_size);
1239#endif /* CONFIG_MAC80211_HT_DEBUG */
1240 goto end_no_lock;
1241 }
1242 /* determine default buffer size */
1243 if (buf_size == 0) {
1244 struct ieee80211_supported_band *sband;
1245
1246 sband = local->hw.wiphy->bands[conf->channel->band];
1247 buf_size = IEEE80211_MIN_AMPDU_BUF;
1248 buf_size = buf_size << sband->ht_info.ampdu_factor;
1249 }
1250
1251
1252 /* examine state machine */
1253 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1254
1255 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1256#ifdef CONFIG_MAC80211_HT_DEBUG
1257 if (net_ratelimit())
1258 printk(KERN_DEBUG "unexpected AddBA Req from "
1259 "%s on tid %u\n",
1260 print_mac(mac, mgmt->sa), tid);
1261#endif /* CONFIG_MAC80211_HT_DEBUG */
1262 goto end;
1263 }
1264
1265 /* prepare A-MPDU MLME for Rx aggregation */
1266 sta->ampdu_mlme.tid_rx[tid] =
1267 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1268 if (!sta->ampdu_mlme.tid_rx[tid]) {
1269 if (net_ratelimit())
1270 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1271 tid);
1272 goto end;
1273 }
1274 /* rx timer */
1275 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1276 sta_rx_agg_session_timer_expired;
1277 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1278 (unsigned long)&sta->timer_to_tid[tid];
1279 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1280
1281 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1282
1283 /* prepare reordering buffer */
1284 tid_agg_rx->reorder_buf =
1285 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1286 if (!tid_agg_rx->reorder_buf) {
1287 if (net_ratelimit())
1288 printk(KERN_ERR "can not allocate reordering buffer "
1289 "to tid %d\n", tid);
1290 kfree(sta->ampdu_mlme.tid_rx[tid]);
1291 goto end;
1292 }
1293 memset(tid_agg_rx->reorder_buf, 0,
1294 buf_size * sizeof(struct sk_buf *));
1295
1296 if (local->ops->ampdu_action)
1297 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1298 sta->addr, tid, &start_seq_num);
1299#ifdef CONFIG_MAC80211_HT_DEBUG
1300 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1301#endif /* CONFIG_MAC80211_HT_DEBUG */
1302
1303 if (ret) {
1304 kfree(tid_agg_rx->reorder_buf);
1305 kfree(tid_agg_rx);
1306 sta->ampdu_mlme.tid_rx[tid] = NULL;
1307 goto end;
1308 }
1309
1310 /* change state and send addba resp */
1311 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1312 tid_agg_rx->dialog_token = dialog_token;
1313 tid_agg_rx->ssn = start_seq_num;
1314 tid_agg_rx->head_seq_num = start_seq_num;
1315 tid_agg_rx->buf_size = buf_size;
1316 tid_agg_rx->timeout = timeout;
1317 tid_agg_rx->stored_mpdu_num = 0;
1318 status = WLAN_STATUS_SUCCESS;
1319end:
1320 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1321
1322end_no_lock:
1323 ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1324 dialog_token, status, 1, buf_size, timeout);
1325 rcu_read_unlock();
1326}
1327
1328static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1329 struct ieee80211_mgmt *mgmt,
1330 size_t len)
1331{
1332 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1333 struct ieee80211_hw *hw = &local->hw;
1334 struct sta_info *sta;
1335 u16 capab;
1336 u16 tid;
1337 u8 *state;
1338
1339 rcu_read_lock();
1340
1341 sta = sta_info_get(local, mgmt->sa);
1342 if (!sta) {
1343 rcu_read_unlock();
1344 return;
1345 }
1346
1347 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1348 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1349
1350 state = &sta->ampdu_mlme.tid_state_tx[tid];
1351
1352 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1353
1354 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1355 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1356 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1357 "%d\n", *state);
1358 goto addba_resp_exit;
1359 }
1360
1361 if (mgmt->u.action.u.addba_resp.dialog_token !=
1362 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1363 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1364#ifdef CONFIG_MAC80211_HT_DEBUG
1365 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1366#endif /* CONFIG_MAC80211_HT_DEBUG */
1367 goto addba_resp_exit;
1368 }
1369
1370 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1371#ifdef CONFIG_MAC80211_HT_DEBUG
1372 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1373#endif /* CONFIG_MAC80211_HT_DEBUG */
1374 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1375 == WLAN_STATUS_SUCCESS) {
1376 if (*state & HT_ADDBA_RECEIVED_MSK)
1377 printk(KERN_DEBUG "double addBA response\n");
1378
1379 *state |= HT_ADDBA_RECEIVED_MSK;
1380 sta->ampdu_mlme.addba_req_num[tid] = 0;
1381
1382 if (*state == HT_AGG_STATE_OPERATIONAL) {
1383 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1384 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1385 }
1386
1387 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1388 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1389 } else {
1390 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1391
1392 sta->ampdu_mlme.addba_req_num[tid]++;
1393 /* this will allow the state check in stop_BA_session */
1394 *state = HT_AGG_STATE_OPERATIONAL;
1395 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1396 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1397 WLAN_BACK_INITIATOR);
1398 }
1399
1400addba_resp_exit:
1401 rcu_read_unlock();
1402}
1403
1404void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1405 u16 initiator, u16 reason_code)
1406{
1407 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1408 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1409 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1410 struct sk_buff *skb;
1411 struct ieee80211_mgmt *mgmt;
1412 u16 params;
1413
1414 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1415 sizeof(mgmt->u.action.u.delba));
1416
1417 if (!skb) {
1418 printk(KERN_ERR "%s: failed to allocate buffer "
1419 "for delba frame\n", dev->name);
1420 return;
1421 }
1422
1423 skb_reserve(skb, local->hw.extra_tx_headroom);
1424 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1425 memset(mgmt, 0, 24);
1426 memcpy(mgmt->da, da, ETH_ALEN);
1427 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1428 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1429 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1430 else
1431 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1432 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1433 IEEE80211_STYPE_ACTION);
1434
1435 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1436
1437 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1438 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1439 params = (u16)(initiator << 11); /* bit 11 initiator */
1440 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1441
1442 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1443 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1444
1445 ieee80211_sta_tx(dev, skb, 0);
1446}
1447
1448void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1449 u16 initiator, u16 reason)
1450{
1451 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1452 struct ieee80211_hw *hw = &local->hw;
1453 struct sta_info *sta;
1454 int ret, i;
1455 DECLARE_MAC_BUF(mac);
1456
1457 rcu_read_lock();
1458
1459 sta = sta_info_get(local, ra);
1460 if (!sta) {
1461 rcu_read_unlock();
1462 return;
1463 }
1464
1465 /* check if TID is in operational state */
1466 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1467 if (sta->ampdu_mlme.tid_state_rx[tid]
1468 != HT_AGG_STATE_OPERATIONAL) {
1469 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1470 rcu_read_unlock();
1471 return;
1472 }
1473 sta->ampdu_mlme.tid_state_rx[tid] =
1474 HT_AGG_STATE_REQ_STOP_BA_MSK |
1475 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1476 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1477
1478 /* stop HW Rx aggregation. ampdu_action existence
1479 * already verified in session init so we add the BUG_ON */
1480 BUG_ON(!local->ops->ampdu_action);
1481
1482#ifdef CONFIG_MAC80211_HT_DEBUG
1483 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1484 print_mac(mac, ra), tid);
1485#endif /* CONFIG_MAC80211_HT_DEBUG */
1486
1487 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1488 ra, tid, NULL);
1489 if (ret)
1490 printk(KERN_DEBUG "HW problem - can not stop rx "
1491 "aggergation for tid %d\n", tid);
1492
1493 /* shutdown timer has not expired */
1494 if (initiator != WLAN_BACK_TIMER)
1495 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1496
1497 /* check if this is a self generated aggregation halt */
1498 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1499 ieee80211_send_delba(dev, ra, tid, 0, reason);
1500
1501 /* free the reordering buffer */
1502 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1503 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1504 /* release the reordered frames */
1505 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1506 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1507 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1508 }
1509 }
1510 /* free resources */
1511 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1512 kfree(sta->ampdu_mlme.tid_rx[tid]);
1513 sta->ampdu_mlme.tid_rx[tid] = NULL;
1514 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1515
1516 rcu_read_unlock();
1517}
1518
1519
1520static void ieee80211_sta_process_delba(struct net_device *dev,
1521 struct ieee80211_mgmt *mgmt, size_t len)
1522{
1523 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1524 struct sta_info *sta;
1525 u16 tid, params;
1526 u16 initiator;
1527 DECLARE_MAC_BUF(mac);
1528
1529 rcu_read_lock();
1530
1531 sta = sta_info_get(local, mgmt->sa);
1532 if (!sta) {
1533 rcu_read_unlock();
1534 return;
1535 }
1536
1537 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1538 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1539 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1540
1541#ifdef CONFIG_MAC80211_HT_DEBUG
1542 if (net_ratelimit())
1543 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1544 print_mac(mac, mgmt->sa),
1545 initiator ? "initiator" : "recipient", tid,
1546 mgmt->u.action.u.delba.reason_code);
1547#endif /* CONFIG_MAC80211_HT_DEBUG */
1548
1549 if (initiator == WLAN_BACK_INITIATOR)
1550 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1551 WLAN_BACK_INITIATOR, 0);
1552 else { /* WLAN_BACK_RECIPIENT */
1553 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1554 sta->ampdu_mlme.tid_state_tx[tid] =
1555 HT_AGG_STATE_OPERATIONAL;
1556 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1557 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1558 WLAN_BACK_RECIPIENT);
1559 }
1560 rcu_read_unlock();
1561}
1562
1563/*
1564 * After sending add Block Ack request we activated a timer until
1565 * add Block Ack response will arrive from the recipient.
1566 * If this timer expires sta_addba_resp_timer_expired will be executed.
1567 */
1568void sta_addba_resp_timer_expired(unsigned long data)
1569{
1570 /* not an elegant detour, but there is no choice as the timer passes
1571 * only one argument, and both sta_info and TID are needed, so init
1572 * flow in sta_info_create gives the TID as data, while the timer_to_id
1573 * array gives the sta through container_of */
1574 u16 tid = *(int *)data;
1575 struct sta_info *temp_sta = container_of((void *)data,
1576 struct sta_info, timer_to_tid[tid]);
1577
1578 struct ieee80211_local *local = temp_sta->local;
1579 struct ieee80211_hw *hw = &local->hw;
1580 struct sta_info *sta;
1581 u8 *state;
1582
1583 rcu_read_lock();
1584
1585 sta = sta_info_get(local, temp_sta->addr);
1586 if (!sta) {
1587 rcu_read_unlock();
1588 return;
1589 }
1590
1591 state = &sta->ampdu_mlme.tid_state_tx[tid];
1592 /* check if the TID waits for addBA response */
1593 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1594 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1595 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1596 *state = HT_AGG_STATE_IDLE;
1597 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1598 "expecting addBA response there", tid);
1599 goto timer_expired_exit;
1600 }
1601
1602 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1603
1604 /* go through the state check in stop_BA_session */
1605 *state = HT_AGG_STATE_OPERATIONAL;
1606 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1607 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1608 WLAN_BACK_INITIATOR);
1609
1610timer_expired_exit:
1611 rcu_read_unlock();
1612}
1613
1614/*
1615 * After accepting the AddBA Request we activated a timer,
1616 * resetting it after each frame that arrives from the originator.
1617 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1618 */
1619void sta_rx_agg_session_timer_expired(unsigned long data)
1620{
1621 /* not an elegant detour, but there is no choice as the timer passes
1622 * only one argument, and verious sta_info are needed here, so init
1623 * flow in sta_info_create gives the TID as data, while the timer_to_id
1624 * array gives the sta through container_of */
1625 u8 *ptid = (u8 *)data;
1626 u8 *timer_to_id = ptid - *ptid;
1627 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1628 timer_to_tid[0]);
1629
1630 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1631 ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1632 (u16)*ptid, WLAN_BACK_TIMER,
1633 WLAN_REASON_QSTA_TIMEOUT);
1634}
1635
1636void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1637{
1638 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1639 int i;
1640
1641 for (i = 0; i < STA_TID_NUM; i++) {
1642 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1643 WLAN_BACK_INITIATOR);
1644 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1645 WLAN_BACK_RECIPIENT,
1646 WLAN_REASON_QSTA_LEAVE_QBSS);
1647 }
1648}
1649
1650static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1651 struct ieee80211_if_sta *ifsta,
1652 struct ieee80211_mgmt *mgmt,
1653 size_t len)
1654{
1655 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1656 u16 auth_alg, auth_transaction, status_code;
1657 DECLARE_MAC_BUF(mac);
1658
1659 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1660 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1661 printk(KERN_DEBUG "%s: authentication frame received from "
1662 "%s, but not in authenticate state - ignored\n",
1663 dev->name, print_mac(mac, mgmt->sa));
1664 return;
1665 }
1666
1667 if (len < 24 + 6) {
1668 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1669 "received from %s - ignored\n",
1670 dev->name, len, print_mac(mac, mgmt->sa));
1671 return;
1672 }
1673
1674 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1675 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1676 printk(KERN_DEBUG "%s: authentication frame received from "
1677 "unknown AP (SA=%s BSSID=%s) - "
1678 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1679 print_mac(mac, mgmt->bssid));
1680 return;
1681 }
1682
1683 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1684 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1685 printk(KERN_DEBUG "%s: authentication frame received from "
1686 "unknown BSSID (SA=%s BSSID=%s) - "
1687 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1688 print_mac(mac, mgmt->bssid));
1689 return;
1690 }
1691
1692 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1693 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1694 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1695
1696 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1697 "transaction=%d status=%d)\n",
1698 dev->name, print_mac(mac, mgmt->sa), auth_alg,
1699 auth_transaction, status_code);
1700
1701 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1702 /* IEEE 802.11 standard does not require authentication in IBSS
1703 * networks and most implementations do not seem to use it.
1704 * However, try to reply to authentication attempts if someone
1705 * has actually implemented this.
1706 * TODO: Could implement shared key authentication. */
1707 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1708 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1709 "frame (alg=%d transaction=%d)\n",
1710 dev->name, auth_alg, auth_transaction);
1711 return;
1712 }
1713 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1714 }
1715
1716 if (auth_alg != ifsta->auth_alg ||
1717 auth_transaction != ifsta->auth_transaction) {
1718 printk(KERN_DEBUG "%s: unexpected authentication frame "
1719 "(alg=%d transaction=%d)\n",
1720 dev->name, auth_alg, auth_transaction);
1721 return;
1722 }
1723
1724 if (status_code != WLAN_STATUS_SUCCESS) {
1725 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1726 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1727 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1728 u8 algs[3];
1729 const int num_algs = ARRAY_SIZE(algs);
1730 int i, pos;
1731 algs[0] = algs[1] = algs[2] = 0xff;
1732 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1733 algs[0] = WLAN_AUTH_OPEN;
1734 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1735 algs[1] = WLAN_AUTH_SHARED_KEY;
1736 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1737 algs[2] = WLAN_AUTH_LEAP;
1738 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1739 pos = 0;
1740 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1741 pos = 1;
1742 else
1743 pos = 2;
1744 for (i = 0; i < num_algs; i++) {
1745 pos++;
1746 if (pos >= num_algs)
1747 pos = 0;
1748 if (algs[pos] == ifsta->auth_alg ||
1749 algs[pos] == 0xff)
1750 continue;
1751 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1752 !ieee80211_sta_wep_configured(dev))
1753 continue;
1754 ifsta->auth_alg = algs[pos];
1755 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1756 "next try\n",
1757 dev->name, ifsta->auth_alg);
1758 break;
1759 }
1760 }
1761 return;
1762 }
1763
1764 switch (ifsta->auth_alg) {
1765 case WLAN_AUTH_OPEN:
1766 case WLAN_AUTH_LEAP:
1767 ieee80211_auth_completed(dev, ifsta);
1768 break;
1769 case WLAN_AUTH_SHARED_KEY:
1770 if (ifsta->auth_transaction == 4)
1771 ieee80211_auth_completed(dev, ifsta);
1772 else
1773 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1774 break;
1775 }
1776}
1777
1778
1779static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1780 struct ieee80211_if_sta *ifsta,
1781 struct ieee80211_mgmt *mgmt,
1782 size_t len)
1783{
1784 u16 reason_code;
1785 DECLARE_MAC_BUF(mac);
1786
1787 if (len < 24 + 2) {
1788 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1789 "received from %s - ignored\n",
1790 dev->name, len, print_mac(mac, mgmt->sa));
1791 return;
1792 }
1793
1794 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1795 printk(KERN_DEBUG "%s: deauthentication frame received from "
1796 "unknown AP (SA=%s BSSID=%s) - "
1797 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1798 print_mac(mac, mgmt->bssid));
1799 return;
1800 }
1801
1802 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1803
1804 printk(KERN_DEBUG "%s: RX deauthentication from %s"
1805 " (reason=%d)\n",
1806 dev->name, print_mac(mac, mgmt->sa), reason_code);
1807
1808 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1809 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1810 }
1811
1812 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1813 ifsta->state == IEEE80211_ASSOCIATE ||
1814 ifsta->state == IEEE80211_ASSOCIATED) {
1815 ifsta->state = IEEE80211_AUTHENTICATE;
1816 mod_timer(&ifsta->timer, jiffies +
1817 IEEE80211_RETRY_AUTH_INTERVAL);
1818 }
1819
1820 ieee80211_set_disassoc(dev, ifsta, 1);
1821 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1822}
1823
1824
1825static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1826 struct ieee80211_if_sta *ifsta,
1827 struct ieee80211_mgmt *mgmt,
1828 size_t len)
1829{
1830 u16 reason_code;
1831 DECLARE_MAC_BUF(mac);
1832
1833 if (len < 24 + 2) {
1834 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1835 "received from %s - ignored\n",
1836 dev->name, len, print_mac(mac, mgmt->sa));
1837 return;
1838 }
1839
1840 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1841 printk(KERN_DEBUG "%s: disassociation frame received from "
1842 "unknown AP (SA=%s BSSID=%s) - "
1843 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1844 print_mac(mac, mgmt->bssid));
1845 return;
1846 }
1847
1848 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1849
1850 printk(KERN_DEBUG "%s: RX disassociation from %s"
1851 " (reason=%d)\n",
1852 dev->name, print_mac(mac, mgmt->sa), reason_code);
1853
1854 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1855 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1856
1857 if (ifsta->state == IEEE80211_ASSOCIATED) {
1858 ifsta->state = IEEE80211_ASSOCIATE;
1859 mod_timer(&ifsta->timer, jiffies +
1860 IEEE80211_RETRY_AUTH_INTERVAL);
1861 }
1862
1863 ieee80211_set_disassoc(dev, ifsta, 0);
1864}
1865
1866
1867static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1868 struct ieee80211_if_sta *ifsta,
1869 struct ieee80211_mgmt *mgmt,
1870 size_t len,
1871 int reassoc)
1872{
1873 struct ieee80211_local *local = sdata->local;
1874 struct net_device *dev = sdata->dev;
1875 struct ieee80211_supported_band *sband;
1876 struct sta_info *sta;
1877 u64 rates, basic_rates;
1878 u16 capab_info, status_code, aid;
1879 struct ieee802_11_elems elems;
1880 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1881 u8 *pos;
1882 int i, j;
1883 DECLARE_MAC_BUF(mac);
1884 bool have_higher_than_11mbit = false;
1885
1886 /* AssocResp and ReassocResp have identical structure, so process both
1887 * of them in this function. */
1888
1889 if (ifsta->state != IEEE80211_ASSOCIATE) {
1890 printk(KERN_DEBUG "%s: association frame received from "
1891 "%s, but not in associate state - ignored\n",
1892 dev->name, print_mac(mac, mgmt->sa));
1893 return;
1894 }
1895
1896 if (len < 24 + 6) {
1897 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1898 "received from %s - ignored\n",
1899 dev->name, len, print_mac(mac, mgmt->sa));
1900 return;
1901 }
1902
1903 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1904 printk(KERN_DEBUG "%s: association frame received from "
1905 "unknown AP (SA=%s BSSID=%s) - "
1906 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1907 print_mac(mac, mgmt->bssid));
1908 return;
1909 }
1910
1911 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1912 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1913 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1914
1915 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1916 "status=%d aid=%d)\n",
1917 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1918 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1919
1920 if (status_code != WLAN_STATUS_SUCCESS) {
1921 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1922 dev->name, status_code);
1923 /* if this was a reassociation, ensure we try a "full"
1924 * association next time. This works around some broken APs
1925 * which do not correctly reject reassociation requests. */
1926 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1927 return;
1928 }
1929
1930 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1931 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1932 "set\n", dev->name, aid);
1933 aid &= ~(BIT(15) | BIT(14));
1934
1935 pos = mgmt->u.assoc_resp.variable;
1936 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1937
1938 if (!elems.supp_rates) {
1939 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1940 dev->name);
1941 return;
1942 }
1943
1944 printk(KERN_DEBUG "%s: associated\n", dev->name);
1945 ifsta->aid = aid;
1946 ifsta->ap_capab = capab_info;
1947
1948 kfree(ifsta->assocresp_ies);
1949 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1950 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1951 if (ifsta->assocresp_ies)
1952 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1953
1954 rcu_read_lock();
1955
1956 /* Add STA entry for the AP */
1957 sta = sta_info_get(local, ifsta->bssid);
1958 if (!sta) {
1959 struct ieee80211_sta_bss *bss;
1960 int err;
1961
1962 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1963 if (!sta) {
1964 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1965 " the AP\n", dev->name);
1966 rcu_read_unlock();
1967 return;
1968 }
1969 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1970 local->hw.conf.channel->center_freq,
1971 ifsta->ssid, ifsta->ssid_len);
1972 if (bss) {
1973 sta->last_rssi = bss->rssi;
1974 sta->last_signal = bss->signal;
1975 sta->last_noise = bss->noise;
1976 ieee80211_rx_bss_put(dev, bss);
1977 }
1978
1979 err = sta_info_insert(sta);
1980 if (err) {
1981 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1982 " the AP (error %d)\n", dev->name, err);
1983 rcu_read_unlock();
1984 return;
1985 }
1986 }
1987
1988 /*
1989 * FIXME: Do we really need to update the sta_info's information here?
1990 * We already know about the AP (we found it in our list) so it
1991 * should already be filled with the right info, no?
1992 * As is stands, all this is racy because typically we assume
1993 * the information that is filled in here (except flags) doesn't
1994 * change while a STA structure is alive. As such, it should move
1995 * to between the sta_info_alloc() and sta_info_insert() above.
1996 */
1997
1998 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1999 WLAN_STA_AUTHORIZED;
2000
2001 rates = 0;
2002 basic_rates = 0;
2003 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2004
2005 for (i = 0; i < elems.supp_rates_len; i++) {
2006 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2007
2008 if (rate > 110)
2009 have_higher_than_11mbit = true;
2010
2011 for (j = 0; j < sband->n_bitrates; j++) {
2012 if (sband->bitrates[j].bitrate == rate)
2013 rates |= BIT(j);
2014 if (elems.supp_rates[i] & 0x80)
2015 basic_rates |= BIT(j);
2016 }
2017 }
2018
2019 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2020 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2021
2022 if (rate > 110)
2023 have_higher_than_11mbit = true;
2024
2025 for (j = 0; j < sband->n_bitrates; j++) {
2026 if (sband->bitrates[j].bitrate == rate)
2027 rates |= BIT(j);
2028 if (elems.ext_supp_rates[i] & 0x80)
2029 basic_rates |= BIT(j);
2030 }
2031 }
2032
2033 sta->supp_rates[local->hw.conf.channel->band] = rates;
2034 sdata->basic_rates = basic_rates;
2035
2036 /* cf. IEEE 802.11 9.2.12 */
2037 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2038 have_higher_than_11mbit)
2039 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2040 else
2041 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2042
2043 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
2044 struct ieee80211_ht_bss_info bss_info;
2045 ieee80211_ht_cap_ie_to_ht_info(
2046 (struct ieee80211_ht_cap *)
2047 elems.ht_cap_elem, &sta->ht_info);
2048 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2049 (struct ieee80211_ht_addt_info *)
2050 elems.ht_info_elem, &bss_info);
2051 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2052 }
2053
2054 rate_control_rate_init(sta, local);
2055
2056 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2057 sta->flags |= WLAN_STA_WME;
2058 rcu_read_unlock();
2059 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2060 elems.wmm_param_len);
2061 } else
2062 rcu_read_unlock();
2063
2064 /* set AID and assoc capability,
2065 * ieee80211_set_associated() will tell the driver */
2066 bss_conf->aid = aid;
2067 bss_conf->assoc_capability = capab_info;
2068 ieee80211_set_associated(dev, ifsta, 1);
2069
2070 ieee80211_associated(dev, ifsta);
2071}
2072
2073
2074/* Caller must hold local->sta_bss_lock */
2075static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2076 struct ieee80211_sta_bss *bss)
2077{
2078 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2079 u8 hash_idx;
2080
2081 if (bss_mesh_cfg(bss))
2082 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2083 bss_mesh_id_len(bss));
2084 else
2085 hash_idx = STA_HASH(bss->bssid);
2086
2087 bss->hnext = local->sta_bss_hash[hash_idx];
2088 local->sta_bss_hash[hash_idx] = bss;
2089}
2090
2091
2092/* Caller must hold local->sta_bss_lock */
2093static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2094 struct ieee80211_sta_bss *bss)
2095{
2096 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2097 struct ieee80211_sta_bss *b, *prev = NULL;
2098 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2099 while (b) {
2100 if (b == bss) {
2101 if (!prev)
2102 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2103 bss->hnext;
2104 else
2105 prev->hnext = bss->hnext;
2106 break;
2107 }
2108 prev = b;
2109 b = b->hnext;
2110 }
2111}
2112
2113
2114static struct ieee80211_sta_bss *
2115ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2116 u8 *ssid, u8 ssid_len)
2117{
2118 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2119 struct ieee80211_sta_bss *bss;
2120
2121 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2122 if (!bss)
2123 return NULL;
2124 atomic_inc(&bss->users);
2125 atomic_inc(&bss->users);
2126 memcpy(bss->bssid, bssid, ETH_ALEN);
2127 bss->freq = freq;
2128 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2129 memcpy(bss->ssid, ssid, ssid_len);
2130 bss->ssid_len = ssid_len;
2131 }
2132
2133 spin_lock_bh(&local->sta_bss_lock);
2134 /* TODO: order by RSSI? */
2135 list_add_tail(&bss->list, &local->sta_bss_list);
2136 __ieee80211_rx_bss_hash_add(dev, bss);
2137 spin_unlock_bh(&local->sta_bss_lock);
2138 return bss;
2139}
2140
2141static struct ieee80211_sta_bss *
2142ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2143 u8 *ssid, u8 ssid_len)
2144{
2145 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2146 struct ieee80211_sta_bss *bss;
2147
2148 spin_lock_bh(&local->sta_bss_lock);
2149 bss = local->sta_bss_hash[STA_HASH(bssid)];
2150 while (bss) {
2151 if (!bss_mesh_cfg(bss) &&
2152 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2153 bss->freq == freq &&
2154 bss->ssid_len == ssid_len &&
2155 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2156 atomic_inc(&bss->users);
2157 break;
2158 }
2159 bss = bss->hnext;
2160 }
2161 spin_unlock_bh(&local->sta_bss_lock);
2162 return bss;
2163}
2164
2165#ifdef CONFIG_MAC80211_MESH
2166static struct ieee80211_sta_bss *
2167ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2168 u8 *mesh_cfg, int freq)
2169{
2170 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2171 struct ieee80211_sta_bss *bss;
2172
2173 spin_lock_bh(&local->sta_bss_lock);
2174 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2175 while (bss) {
2176 if (bss_mesh_cfg(bss) &&
2177 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2178 bss->freq == freq &&
2179 mesh_id_len == bss->mesh_id_len &&
2180 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2181 mesh_id_len))) {
2182 atomic_inc(&bss->users);
2183 break;
2184 }
2185 bss = bss->hnext;
2186 }
2187 spin_unlock_bh(&local->sta_bss_lock);
2188 return bss;
2189}
2190
2191static struct ieee80211_sta_bss *
2192ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2193 u8 *mesh_cfg, int mesh_config_len, int freq)
2194{
2195 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2196 struct ieee80211_sta_bss *bss;
2197
2198 if (mesh_config_len != MESH_CFG_LEN)
2199 return NULL;
2200
2201 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2202 if (!bss)
2203 return NULL;
2204
2205 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2206 if (!bss->mesh_cfg) {
2207 kfree(bss);
2208 return NULL;
2209 }
2210
2211 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2212 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2213 if (!bss->mesh_id) {
2214 kfree(bss->mesh_cfg);
2215 kfree(bss);
2216 return NULL;
2217 }
2218 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2219 }
2220
2221 atomic_inc(&bss->users);
2222 atomic_inc(&bss->users);
2223 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2224 bss->mesh_id_len = mesh_id_len;
2225 bss->freq = freq;
2226 spin_lock_bh(&local->sta_bss_lock);
2227 /* TODO: order by RSSI? */
2228 list_add_tail(&bss->list, &local->sta_bss_list);
2229 __ieee80211_rx_bss_hash_add(dev, bss);
2230 spin_unlock_bh(&local->sta_bss_lock);
2231 return bss;
2232}
2233#endif
2234
2235static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2236{
2237 kfree(bss->wpa_ie);
2238 kfree(bss->rsn_ie);
2239 kfree(bss->wmm_ie);
2240 kfree(bss->ht_ie);
2241 kfree(bss_mesh_id(bss));
2242 kfree(bss_mesh_cfg(bss));
2243 kfree(bss);
2244}
2245
2246
2247static void ieee80211_rx_bss_put(struct net_device *dev,
2248 struct ieee80211_sta_bss *bss)
2249{
2250 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2251 if (!atomic_dec_and_test(&bss->users))
2252 return;
2253
2254 spin_lock_bh(&local->sta_bss_lock);
2255 __ieee80211_rx_bss_hash_del(dev, bss);
2256 list_del(&bss->list);
2257 spin_unlock_bh(&local->sta_bss_lock);
2258 ieee80211_rx_bss_free(bss);
2259}
2260
2261
2262void ieee80211_rx_bss_list_init(struct net_device *dev)
2263{
2264 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2265 spin_lock_init(&local->sta_bss_lock);
2266 INIT_LIST_HEAD(&local->sta_bss_list);
2267}
2268
2269
2270void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2271{
2272 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2273 struct ieee80211_sta_bss *bss, *tmp;
2274
2275 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2276 ieee80211_rx_bss_put(dev, bss);
2277}
2278
2279
2280static int ieee80211_sta_join_ibss(struct net_device *dev,
2281 struct ieee80211_if_sta *ifsta,
2282 struct ieee80211_sta_bss *bss)
2283{
2284 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2285 int res, rates, i, j;
2286 struct sk_buff *skb;
2287 struct ieee80211_mgmt *mgmt;
2288 struct ieee80211_tx_control control;
2289 struct rate_selection ratesel;
2290 u8 *pos;
2291 struct ieee80211_sub_if_data *sdata;
2292 struct ieee80211_supported_band *sband;
2293
2294 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2295
2296 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2297
2298 /* Remove possible STA entries from other IBSS networks. */
2299 sta_info_flush_delayed(sdata);
2300
2301 if (local->ops->reset_tsf) {
2302 /* Reset own TSF to allow time synchronization work. */
2303 local->ops->reset_tsf(local_to_hw(local));
2304 }
2305 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2306 res = ieee80211_if_config(dev);
2307 if (res)
2308 return res;
2309
2310 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2311
2312 sdata->drop_unencrypted = bss->capability &
2313 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2314
2315 res = ieee80211_set_freq(local, bss->freq);
2316
2317 if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2318 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2319 "%d MHz\n", dev->name, local->oper_channel->center_freq);
2320 return -1;
2321 }
2322
2323 /* Set beacon template */
2324 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2325 do {
2326 if (!skb)
2327 break;
2328
2329 skb_reserve(skb, local->hw.extra_tx_headroom);
2330
2331 mgmt = (struct ieee80211_mgmt *)
2332 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2333 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2334 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2335 IEEE80211_STYPE_BEACON);
2336 memset(mgmt->da, 0xff, ETH_ALEN);
2337 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2338 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2339 mgmt->u.beacon.beacon_int =
2340 cpu_to_le16(local->hw.conf.beacon_int);
2341 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2342
2343 pos = skb_put(skb, 2 + ifsta->ssid_len);
2344 *pos++ = WLAN_EID_SSID;
2345 *pos++ = ifsta->ssid_len;
2346 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2347
2348 rates = bss->supp_rates_len;
2349 if (rates > 8)
2350 rates = 8;
2351 pos = skb_put(skb, 2 + rates);
2352 *pos++ = WLAN_EID_SUPP_RATES;
2353 *pos++ = rates;
2354 memcpy(pos, bss->supp_rates, rates);
2355
2356 if (bss->band == IEEE80211_BAND_2GHZ) {
2357 pos = skb_put(skb, 2 + 1);
2358 *pos++ = WLAN_EID_DS_PARAMS;
2359 *pos++ = 1;
2360 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2361 }
2362
2363 pos = skb_put(skb, 2 + 2);
2364 *pos++ = WLAN_EID_IBSS_PARAMS;
2365 *pos++ = 2;
2366 /* FIX: set ATIM window based on scan results */
2367 *pos++ = 0;
2368 *pos++ = 0;
2369
2370 if (bss->supp_rates_len > 8) {
2371 rates = bss->supp_rates_len - 8;
2372 pos = skb_put(skb, 2 + rates);
2373 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2374 *pos++ = rates;
2375 memcpy(pos, &bss->supp_rates[8], rates);
2376 }
2377
2378 memset(&control, 0, sizeof(control));
2379 rate_control_get_rate(dev, sband, skb, &ratesel);
2380 if (!ratesel.rate) {
2381 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2382 "for IBSS beacon\n", dev->name);
2383 break;
2384 }
2385 control.vif = &sdata->vif;
2386 control.tx_rate = ratesel.rate;
2387 if (sdata->bss_conf.use_short_preamble &&
2388 ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2389 control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2390 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2391 control.flags |= IEEE80211_TXCTL_NO_ACK;
2392 control.retry_limit = 1;
2393
2394 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2395 if (ifsta->probe_resp) {
2396 mgmt = (struct ieee80211_mgmt *)
2397 ifsta->probe_resp->data;
2398 mgmt->frame_control =
2399 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2400 IEEE80211_STYPE_PROBE_RESP);
2401 } else {
2402 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2403 "template for IBSS\n", dev->name);
2404 }
2405
2406 if (local->ops->beacon_update &&
2407 local->ops->beacon_update(local_to_hw(local),
2408 skb, &control) == 0) {
2409 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2410 "template\n", dev->name);
2411 skb = NULL;
2412 }
2413
2414 rates = 0;
2415 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2416 for (i = 0; i < bss->supp_rates_len; i++) {
2417 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2418 for (j = 0; j < sband->n_bitrates; j++)
2419 if (sband->bitrates[j].bitrate == bitrate)
2420 rates |= BIT(j);
2421 }
2422 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2423
2424 ieee80211_sta_def_wmm_params(dev, bss, 1);
2425 } while (0);
2426
2427 if (skb) {
2428 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2429 "template\n", dev->name);
2430 dev_kfree_skb(skb);
2431 }
2432
2433 ifsta->state = IEEE80211_IBSS_JOINED;
2434 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2435
2436 ieee80211_rx_bss_put(dev, bss);
2437
2438 return res;
2439}
2440
2441u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2442 struct ieee802_11_elems *elems,
2443 enum ieee80211_band band)
2444{
2445 struct ieee80211_supported_band *sband;
2446 struct ieee80211_rate *bitrates;
2447 size_t num_rates;
2448 u64 supp_rates;
2449 int i, j;
2450 sband = local->hw.wiphy->bands[band];
2451
2452 if (!sband) {
2453 WARN_ON(1);
2454 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2455 }
2456
2457 bitrates = sband->bitrates;
2458 num_rates = sband->n_bitrates;
2459 supp_rates = 0;
2460 for (i = 0; i < elems->supp_rates_len +
2461 elems->ext_supp_rates_len; i++) {
2462 u8 rate = 0;
2463 int own_rate;
2464 if (i < elems->supp_rates_len)
2465 rate = elems->supp_rates[i];
2466 else if (elems->ext_supp_rates)
2467 rate = elems->ext_supp_rates
2468 [i - elems->supp_rates_len];
2469 own_rate = 5 * (rate & 0x7f);
2470 for (j = 0; j < num_rates; j++)
2471 if (bitrates[j].bitrate == own_rate)
2472 supp_rates |= BIT(j);
2473 }
2474 return supp_rates;
2475}
2476
2477
2478static void ieee80211_rx_bss_info(struct net_device *dev,
2479 struct ieee80211_mgmt *mgmt,
2480 size_t len,
2481 struct ieee80211_rx_status *rx_status,
2482 int beacon)
2483{
2484 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2485 struct ieee802_11_elems elems;
2486 size_t baselen;
2487 int freq, clen;
2488 struct ieee80211_sta_bss *bss;
2489 struct sta_info *sta;
2490 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2491 u64 beacon_timestamp, rx_timestamp;
2492 struct ieee80211_channel *channel;
2493 DECLARE_MAC_BUF(mac);
2494 DECLARE_MAC_BUF(mac2);
2495
2496 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2497 return; /* ignore ProbeResp to foreign address */
2498
2499#if 0
2500 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2501 dev->name, beacon ? "Beacon" : "Probe Response",
2502 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2503#endif
2504
2505 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2506 if (baselen > len)
2507 return;
2508
2509 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2510 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2511
2512 if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2513 elems.mesh_config && mesh_matches_local(&elems, dev)) {
2514 u64 rates = ieee80211_sta_get_rates(local, &elems,
2515 rx_status->band);
2516
2517 mesh_neighbour_update(mgmt->sa, rates, dev,
2518 mesh_peer_accepts_plinks(&elems, dev));
2519 }
2520
2521 rcu_read_lock();
2522
2523 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2524 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2525 (sta = sta_info_get(local, mgmt->sa))) {
2526 u64 prev_rates;
2527 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2528 rx_status->band);
2529
2530 prev_rates = sta->supp_rates[rx_status->band];
2531 sta->supp_rates[rx_status->band] &= supp_rates;
2532 if (sta->supp_rates[rx_status->band] == 0) {
2533 /* No matching rates - this should not really happen.
2534 * Make sure that at least one rate is marked
2535 * supported to avoid issues with TX rate ctrl. */
2536 sta->supp_rates[rx_status->band] =
2537 sdata->u.sta.supp_rates_bits[rx_status->band];
2538 }
2539 if (sta->supp_rates[rx_status->band] != prev_rates) {
2540 printk(KERN_DEBUG "%s: updated supp_rates set for "
2541 "%s based on beacon info (0x%llx & 0x%llx -> "
2542 "0x%llx)\n",
2543 dev->name, print_mac(mac, sta->addr),
2544 (unsigned long long) prev_rates,
2545 (unsigned long long) supp_rates,
2546 (unsigned long long) sta->supp_rates[rx_status->band]);
2547 }
2548 }
2549
2550 rcu_read_unlock();
2551
2552 if (elems.ds_params && elems.ds_params_len == 1)
2553 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2554 else
2555 freq = rx_status->freq;
2556
2557 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2558
2559 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2560 return;
2561
2562#ifdef CONFIG_MAC80211_MESH
2563 if (elems.mesh_config)
2564 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2565 elems.mesh_id_len, elems.mesh_config, freq);
2566 else
2567#endif
2568 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2569 elems.ssid, elems.ssid_len);
2570 if (!bss) {
2571#ifdef CONFIG_MAC80211_MESH
2572 if (elems.mesh_config)
2573 bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2574 elems.mesh_id_len, elems.mesh_config,
2575 elems.mesh_config_len, freq);
2576 else
2577#endif
2578 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2579 elems.ssid, elems.ssid_len);
2580 if (!bss)
2581 return;
2582 } else {
2583#if 0
2584 /* TODO: order by RSSI? */
2585 spin_lock_bh(&local->sta_bss_lock);
2586 list_move_tail(&bss->list, &local->sta_bss_list);
2587 spin_unlock_bh(&local->sta_bss_lock);
2588#endif
2589 }
2590
2591 /* save the ERP value so that it is available at association time */
2592 if (elems.erp_info && elems.erp_info_len >= 1) {
2593 bss->erp_value = elems.erp_info[0];
2594 bss->has_erp_value = 1;
2595 }
2596
2597 if (elems.ht_cap_elem &&
2598 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2599 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2600 kfree(bss->ht_ie);
2601 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2602 if (bss->ht_ie) {
2603 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2604 elems.ht_cap_elem_len + 2);
2605 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2606 } else
2607 bss->ht_ie_len = 0;
2608 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2609 kfree(bss->ht_ie);
2610 bss->ht_ie = NULL;
2611 bss->ht_ie_len = 0;
2612 }
2613
2614 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2615 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2616
2617 bss->supp_rates_len = 0;
2618 if (elems.supp_rates) {
2619 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2620 if (clen > elems.supp_rates_len)
2621 clen = elems.supp_rates_len;
2622 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2623 clen);
2624 bss->supp_rates_len += clen;
2625 }
2626 if (elems.ext_supp_rates) {
2627 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2628 if (clen > elems.ext_supp_rates_len)
2629 clen = elems.ext_supp_rates_len;
2630 memcpy(&bss->supp_rates[bss->supp_rates_len],
2631 elems.ext_supp_rates, clen);
2632 bss->supp_rates_len += clen;
2633 }
2634
2635 bss->band = rx_status->band;
2636
2637 bss->timestamp = beacon_timestamp;
2638 bss->last_update = jiffies;
2639 bss->rssi = rx_status->ssi;
2640 bss->signal = rx_status->signal;
2641 bss->noise = rx_status->noise;
2642 if (!beacon && !bss->probe_resp)
2643 bss->probe_resp = true;
2644
2645 /*
2646 * In STA mode, the remaining parameters should not be overridden
2647 * by beacons because they're not necessarily accurate there.
2648 */
2649 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2650 bss->probe_resp && beacon) {
2651 ieee80211_rx_bss_put(dev, bss);
2652 return;
2653 }
2654
2655 if (elems.wpa &&
2656 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2657 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2658 kfree(bss->wpa_ie);
2659 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2660 if (bss->wpa_ie) {
2661 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2662 bss->wpa_ie_len = elems.wpa_len + 2;
2663 } else
2664 bss->wpa_ie_len = 0;
2665 } else if (!elems.wpa && bss->wpa_ie) {
2666 kfree(bss->wpa_ie);
2667 bss->wpa_ie = NULL;
2668 bss->wpa_ie_len = 0;
2669 }
2670
2671 if (elems.rsn &&
2672 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2673 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2674 kfree(bss->rsn_ie);
2675 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2676 if (bss->rsn_ie) {
2677 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2678 bss->rsn_ie_len = elems.rsn_len + 2;
2679 } else
2680 bss->rsn_ie_len = 0;
2681 } else if (!elems.rsn && bss->rsn_ie) {
2682 kfree(bss->rsn_ie);
2683 bss->rsn_ie = NULL;
2684 bss->rsn_ie_len = 0;
2685 }
2686
2687 /*
2688 * Cf.
2689 * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2690 *
2691 * quoting:
2692 *
2693 * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2694 * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2695 * Alliance (September 1, 2004) is incorporated by reference herein.
2696 * The inclusion of the WMM Parameters in probe responses and
2697 * association responses is mandatory for WMM enabled networks. The
2698 * inclusion of the WMM Parameters in beacons, however, is optional.
2699 */
2700
2701 if (elems.wmm_param &&
2702 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2703 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2704 kfree(bss->wmm_ie);
2705 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2706 if (bss->wmm_ie) {
2707 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2708 elems.wmm_param_len + 2);
2709 bss->wmm_ie_len = elems.wmm_param_len + 2;
2710 } else
2711 bss->wmm_ie_len = 0;
2712 } else if (!elems.wmm_param && bss->wmm_ie) {
2713 kfree(bss->wmm_ie);
2714 bss->wmm_ie = NULL;
2715 bss->wmm_ie_len = 0;
2716 }
2717
2718 /* check if we need to merge IBSS */
2719 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2720 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2721 bss->capability & WLAN_CAPABILITY_IBSS &&
2722 bss->freq == local->oper_channel->center_freq &&
2723 elems.ssid_len == sdata->u.sta.ssid_len &&
2724 memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2725 if (rx_status->flag & RX_FLAG_TSFT) {
2726 /* in order for correct IBSS merging we need mactime
2727 *
2728 * since mactime is defined as the time the first data
2729 * symbol of the frame hits the PHY, and the timestamp
2730 * of the beacon is defined as "the time that the data
2731 * symbol containing the first bit of the timestamp is
2732 * transmitted to the PHY plus the transmitting STA’s
2733 * delays through its local PHY from the MAC-PHY
2734 * interface to its interface with the WM"
2735 * (802.11 11.1.2) - equals the time this bit arrives at
2736 * the receiver - we have to take into account the
2737 * offset between the two.
2738 * e.g: at 1 MBit that means mactime is 192 usec earlier
2739 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2740 */
2741 int rate = local->hw.wiphy->bands[rx_status->band]->
2742 bitrates[rx_status->rate_idx].bitrate;
2743 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2744 } else if (local && local->ops && local->ops->get_tsf)
2745 /* second best option: get current TSF */
2746 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2747 else
2748 /* can't merge without knowing the TSF */
2749 rx_timestamp = -1LLU;
2750#ifdef CONFIG_MAC80211_IBSS_DEBUG
2751 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2752 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2753 print_mac(mac, mgmt->sa),
2754 print_mac(mac2, mgmt->bssid),
2755 (unsigned long long)rx_timestamp,
2756 (unsigned long long)beacon_timestamp,
2757 (unsigned long long)(rx_timestamp - beacon_timestamp),
2758 jiffies);
2759#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2760 if (beacon_timestamp > rx_timestamp) {
2761#ifndef CONFIG_MAC80211_IBSS_DEBUG
2762 if (net_ratelimit())
2763#endif
2764 printk(KERN_DEBUG "%s: beacon TSF higher than "
2765 "local TSF - IBSS merge with BSSID %s\n",
2766 dev->name, print_mac(mac, mgmt->bssid));
2767 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2768 ieee80211_ibss_add_sta(dev, NULL,
2769 mgmt->bssid, mgmt->sa);
2770 }
2771 }
2772
2773 ieee80211_rx_bss_put(dev, bss);
2774}
2775
2776
2777static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2778 struct ieee80211_mgmt *mgmt,
2779 size_t len,
2780 struct ieee80211_rx_status *rx_status)
2781{
2782 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2783}
2784
2785
2786static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2787 struct ieee80211_mgmt *mgmt,
2788 size_t len,
2789 struct ieee80211_rx_status *rx_status)
2790{
2791 struct ieee80211_sub_if_data *sdata;
2792 struct ieee80211_if_sta *ifsta;
2793 size_t baselen;
2794 struct ieee802_11_elems elems;
2795 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2796 struct ieee80211_conf *conf = &local->hw.conf;
2797 u32 changed = 0;
2798
2799 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2800
2801 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2802 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2803 return;
2804 ifsta = &sdata->u.sta;
2805
2806 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2807 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2808 return;
2809
2810 /* Process beacon from the current BSS */
2811 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2812 if (baselen > len)
2813 return;
2814
2815 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2816
2817 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2818 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2819 elems.wmm_param_len);
2820 }
2821
2822 /* Do not send changes to driver if we are scanning. This removes
2823 * requirement that driver's bss_info_changed function needs to be
2824 * atomic. */
2825 if (local->sta_sw_scanning || local->sta_hw_scanning)
2826 return;
2827
2828 if (elems.erp_info && elems.erp_info_len >= 1)
2829 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2830 else {
2831 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2832 changed |= ieee80211_handle_protect_preamb(sdata, false,
2833 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2834 }
2835
2836 if (elems.ht_cap_elem && elems.ht_info_elem &&
2837 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2838 struct ieee80211_ht_bss_info bss_info;
2839
2840 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2841 (struct ieee80211_ht_addt_info *)
2842 elems.ht_info_elem, &bss_info);
2843 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2844 &bss_info);
2845 }
2846
2847 ieee80211_bss_info_change_notify(sdata, changed);
2848}
2849
2850
2851static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2852 struct ieee80211_if_sta *ifsta,
2853 struct ieee80211_mgmt *mgmt,
2854 size_t len,
2855 struct ieee80211_rx_status *rx_status)
2856{
2857 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2858 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2859 int tx_last_beacon;
2860 struct sk_buff *skb;
2861 struct ieee80211_mgmt *resp;
2862 u8 *pos, *end;
2863 DECLARE_MAC_BUF(mac);
2864#ifdef CONFIG_MAC80211_IBSS_DEBUG
2865 DECLARE_MAC_BUF(mac2);
2866 DECLARE_MAC_BUF(mac3);
2867#endif
2868
2869 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2870 ifsta->state != IEEE80211_IBSS_JOINED ||
2871 len < 24 + 2 || !ifsta->probe_resp)
2872 return;
2873
2874 if (local->ops->tx_last_beacon)
2875 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2876 else
2877 tx_last_beacon = 1;
2878
2879#ifdef CONFIG_MAC80211_IBSS_DEBUG
2880 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2881 "%s (tx_last_beacon=%d)\n",
2882 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2883 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2884#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2885
2886 if (!tx_last_beacon)
2887 return;
2888
2889 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2890 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2891 return;
2892
2893 end = ((u8 *) mgmt) + len;
2894 pos = mgmt->u.probe_req.variable;
2895 if (pos[0] != WLAN_EID_SSID ||
2896 pos + 2 + pos[1] > end) {
2897 if (net_ratelimit()) {
2898 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2899 "from %s\n",
2900 dev->name, print_mac(mac, mgmt->sa));
2901 }
2902 return;
2903 }
2904 if (pos[1] != 0 &&
2905 (pos[1] != ifsta->ssid_len ||
2906 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2907 /* Ignore ProbeReq for foreign SSID */
2908 return;
2909 }
2910
2911 /* Reply with ProbeResp */
2912 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2913 if (!skb)
2914 return;
2915
2916 resp = (struct ieee80211_mgmt *) skb->data;
2917 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2918#ifdef CONFIG_MAC80211_IBSS_DEBUG
2919 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2920 dev->name, print_mac(mac, resp->da));
2921#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2922 ieee80211_sta_tx(dev, skb, 0);
2923}
2924
2925static void ieee80211_rx_mgmt_action(struct net_device *dev,
2926 struct ieee80211_if_sta *ifsta,
2927 struct ieee80211_mgmt *mgmt,
2928 size_t len,
2929 struct ieee80211_rx_status *rx_status)
2930{
2931 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2932
2933 if (len < IEEE80211_MIN_ACTION_SIZE)
2934 return;
2935
2936 switch (mgmt->u.action.category) {
2937 case WLAN_CATEGORY_BACK:
2938 switch (mgmt->u.action.u.addba_req.action_code) {
2939 case WLAN_ACTION_ADDBA_REQ:
2940 if (len < (IEEE80211_MIN_ACTION_SIZE +
2941 sizeof(mgmt->u.action.u.addba_req)))
2942 break;
2943 ieee80211_sta_process_addba_request(dev, mgmt, len);
2944 break;
2945 case WLAN_ACTION_ADDBA_RESP:
2946 if (len < (IEEE80211_MIN_ACTION_SIZE +
2947 sizeof(mgmt->u.action.u.addba_resp)))
2948 break;
2949 ieee80211_sta_process_addba_resp(dev, mgmt, len);
2950 break;
2951 case WLAN_ACTION_DELBA:
2952 if (len < (IEEE80211_MIN_ACTION_SIZE +
2953 sizeof(mgmt->u.action.u.delba)))
2954 break;
2955 ieee80211_sta_process_delba(dev, mgmt, len);
2956 break;
2957 default:
2958 if (net_ratelimit())
2959 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2960 dev->name);
2961 break;
2962 }
2963 break;
2964 case PLINK_CATEGORY:
2965 if (ieee80211_vif_is_mesh(&sdata->vif))
2966 mesh_rx_plink_frame(dev, mgmt, len, rx_status);
2967 break;
2968 case MESH_PATH_SEL_CATEGORY:
2969 if (ieee80211_vif_is_mesh(&sdata->vif))
2970 mesh_rx_path_sel_frame(dev, mgmt, len);
2971 break;
2972 default:
2973 if (net_ratelimit())
2974 printk(KERN_DEBUG "%s: Rx unknown action frame - "
2975 "category=%d\n", dev->name, mgmt->u.action.category);
2976 break;
2977 }
2978}
2979
2980void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2981 struct ieee80211_rx_status *rx_status)
2982{
2983 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2984 struct ieee80211_sub_if_data *sdata;
2985 struct ieee80211_if_sta *ifsta;
2986 struct ieee80211_mgmt *mgmt;
2987 u16 fc;
2988
2989 if (skb->len < 24)
2990 goto fail;
2991
2992 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2993 ifsta = &sdata->u.sta;
2994
2995 mgmt = (struct ieee80211_mgmt *) skb->data;
2996 fc = le16_to_cpu(mgmt->frame_control);
2997
2998 switch (fc & IEEE80211_FCTL_STYPE) {
2999 case IEEE80211_STYPE_PROBE_REQ:
3000 case IEEE80211_STYPE_PROBE_RESP:
3001 case IEEE80211_STYPE_BEACON:
3002 case IEEE80211_STYPE_ACTION:
3003 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3004 case IEEE80211_STYPE_AUTH:
3005 case IEEE80211_STYPE_ASSOC_RESP:
3006 case IEEE80211_STYPE_REASSOC_RESP:
3007 case IEEE80211_STYPE_DEAUTH:
3008 case IEEE80211_STYPE_DISASSOC:
3009 skb_queue_tail(&ifsta->skb_queue, skb);
3010 queue_work(local->hw.workqueue, &ifsta->work);
3011 return;
3012 default:
3013 printk(KERN_DEBUG "%s: received unknown management frame - "
3014 "stype=%d\n", dev->name,
3015 (fc & IEEE80211_FCTL_STYPE) >> 4);
3016 break;
3017 }
3018
3019 fail:
3020 kfree_skb(skb);
3021}
3022
3023
3024static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3025 struct sk_buff *skb)
3026{
3027 struct ieee80211_rx_status *rx_status;
3028 struct ieee80211_sub_if_data *sdata;
3029 struct ieee80211_if_sta *ifsta;
3030 struct ieee80211_mgmt *mgmt;
3031 u16 fc;
3032
3033 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3034 ifsta = &sdata->u.sta;
3035
3036 rx_status = (struct ieee80211_rx_status *) skb->cb;
3037 mgmt = (struct ieee80211_mgmt *) skb->data;
3038 fc = le16_to_cpu(mgmt->frame_control);
3039
3040 switch (fc & IEEE80211_FCTL_STYPE) {
3041 case IEEE80211_STYPE_PROBE_REQ:
3042 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3043 rx_status);
3044 break;
3045 case IEEE80211_STYPE_PROBE_RESP:
3046 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3047 break;
3048 case IEEE80211_STYPE_BEACON:
3049 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3050 break;
3051 case IEEE80211_STYPE_AUTH:
3052 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3053 break;
3054 case IEEE80211_STYPE_ASSOC_RESP:
3055 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3056 break;
3057 case IEEE80211_STYPE_REASSOC_RESP:
3058 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3059 break;
3060 case IEEE80211_STYPE_DEAUTH:
3061 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3062 break;
3063 case IEEE80211_STYPE_DISASSOC:
3064 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3065 break;
3066 case IEEE80211_STYPE_ACTION:
3067 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3068 break;
3069 }
3070
3071 kfree_skb(skb);
3072}
3073
3074
3075ieee80211_rx_result
3076ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3077 struct ieee80211_rx_status *rx_status)
3078{
3079 struct ieee80211_mgmt *mgmt;
3080 u16 fc;
3081
3082 if (skb->len < 2)
3083 return RX_DROP_UNUSABLE;
3084
3085 mgmt = (struct ieee80211_mgmt *) skb->data;
3086 fc = le16_to_cpu(mgmt->frame_control);
3087
3088 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
3089 return RX_CONTINUE;
3090
3091 if (skb->len < 24)
3092 return RX_DROP_MONITOR;
3093
3094 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3095 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3096 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3097 skb->len, rx_status);
3098 dev_kfree_skb(skb);
3099 return RX_QUEUED;
3100 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3101 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3102 rx_status);
3103 dev_kfree_skb(skb);
3104 return RX_QUEUED;
3105 }
3106 }
3107 return RX_CONTINUE;
3108}
3109
3110
3111static int ieee80211_sta_active_ibss(struct net_device *dev)
3112{
3113 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3114 int active = 0;
3115 struct sta_info *sta;
3116 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3117
3118 rcu_read_lock();
3119
3120 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3121 if (sta->sdata == sdata &&
3122 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3123 jiffies)) {
3124 active++;
3125 break;
3126 }
3127 }
3128
3129 rcu_read_unlock();
3130
3131 return active;
3132}
3133
3134
3135static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3136{
3137 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3138 struct sta_info *sta, *tmp;
3139 LIST_HEAD(tmp_list);
3140 DECLARE_MAC_BUF(mac);
3141 unsigned long flags;
3142
3143 spin_lock_irqsave(&local->sta_lock, flags);
3144 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3145 if (time_after(jiffies, sta->last_rx + exp_time)) {
3146 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3147 dev->name, print_mac(mac, sta->addr));
3148 __sta_info_unlink(&sta);
3149 if (sta)
3150 list_add(&sta->list, &tmp_list);
3151 }
3152 spin_unlock_irqrestore(&local->sta_lock, flags);
3153
3154 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3155 sta_info_destroy(sta);
3156}
3157
3158
3159static void ieee80211_sta_merge_ibss(struct net_device *dev,
3160 struct ieee80211_if_sta *ifsta)
3161{
3162 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3163
3164 ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3165 if (ieee80211_sta_active_ibss(dev))
3166 return;
3167
3168 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3169 "IBSS networks with same SSID (merge)\n", dev->name);
3170 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3171}
3172
3173
3174#ifdef CONFIG_MAC80211_MESH
3175static void ieee80211_mesh_housekeeping(struct net_device *dev,
3176 struct ieee80211_if_sta *ifsta)
3177{
3178 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3179 bool free_plinks;
3180
3181 ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3182 mesh_path_expire(dev);
3183
3184 free_plinks = mesh_plink_availables(sdata);
3185 if (free_plinks != sdata->u.sta.accepting_plinks)
3186 ieee80211_if_config_beacon(dev);
3187
3188 mod_timer(&ifsta->timer, jiffies +
3189 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3190}
3191
3192
3193void ieee80211_start_mesh(struct net_device *dev)
3194{
3195 struct ieee80211_if_sta *ifsta;
3196 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3197 ifsta = &sdata->u.sta;
3198 ifsta->state = IEEE80211_MESH_UP;
3199 ieee80211_sta_timer((unsigned long)sdata);
3200}
3201#endif
3202
3203
3204void ieee80211_sta_timer(unsigned long data)
3205{
3206 struct ieee80211_sub_if_data *sdata =
3207 (struct ieee80211_sub_if_data *) data;
3208 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3209 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3210
3211 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3212 queue_work(local->hw.workqueue, &ifsta->work);
3213}
3214
3215void ieee80211_sta_work(struct work_struct *work)
3216{
3217 struct ieee80211_sub_if_data *sdata =
3218 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3219 struct net_device *dev = sdata->dev;
3220 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3221 struct ieee80211_if_sta *ifsta;
3222 struct sk_buff *skb;
3223
3224 if (!netif_running(dev))
3225 return;
3226
3227 if (local->sta_sw_scanning || local->sta_hw_scanning)
3228 return;
3229
3230 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3231 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3232 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3233 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3234 "(type=%d)\n", dev->name, sdata->vif.type);
3235 return;
3236 }
3237 ifsta = &sdata->u.sta;
3238
3239 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3240 ieee80211_sta_rx_queued_mgmt(dev, skb);
3241
3242#ifdef CONFIG_MAC80211_MESH
3243 if (ifsta->preq_queue_len &&
3244 time_after(jiffies,
3245 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3246 mesh_path_start_discovery(dev);
3247#endif
3248
3249 if (ifsta->state != IEEE80211_AUTHENTICATE &&
3250 ifsta->state != IEEE80211_ASSOCIATE &&
3251 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3252 if (ifsta->scan_ssid_len)
3253 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3254 else
3255 ieee80211_sta_start_scan(dev, NULL, 0);
3256 return;
3257 }
3258
3259 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3260 if (ieee80211_sta_config_auth(dev, ifsta))
3261 return;
3262 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3263 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3264 return;
3265
3266 switch (ifsta->state) {
3267 case IEEE80211_DISABLED:
3268 break;
3269 case IEEE80211_AUTHENTICATE:
3270 ieee80211_authenticate(dev, ifsta);
3271 break;
3272 case IEEE80211_ASSOCIATE:
3273 ieee80211_associate(dev, ifsta);
3274 break;
3275 case IEEE80211_ASSOCIATED:
3276 ieee80211_associated(dev, ifsta);
3277 break;
3278 case IEEE80211_IBSS_SEARCH:
3279 ieee80211_sta_find_ibss(dev, ifsta);
3280 break;
3281 case IEEE80211_IBSS_JOINED:
3282 ieee80211_sta_merge_ibss(dev, ifsta);
3283 break;
3284#ifdef CONFIG_MAC80211_MESH
3285 case IEEE80211_MESH_UP:
3286 ieee80211_mesh_housekeeping(dev, ifsta);
3287 break;
3288#endif
3289 default:
3290 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3291 ifsta->state);
3292 break;
3293 }
3294
3295 if (ieee80211_privacy_mismatch(dev, ifsta)) {
3296 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3297 "mixed-cell disabled - disassociate\n", dev->name);
3298
3299 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3300 ieee80211_set_disassoc(dev, ifsta, 0);
3301 }
3302}
3303
3304
3305static void ieee80211_sta_reset_auth(struct net_device *dev,
3306 struct ieee80211_if_sta *ifsta)
3307{
3308 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3309
3310 if (local->ops->reset_tsf) {
3311 /* Reset own TSF to allow time synchronization work. */
3312 local->ops->reset_tsf(local_to_hw(local));
3313 }
3314
3315 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3316
3317
3318 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3319 ifsta->auth_alg = WLAN_AUTH_OPEN;
3320 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3321 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3322 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3323 ifsta->auth_alg = WLAN_AUTH_LEAP;
3324 else
3325 ifsta->auth_alg = WLAN_AUTH_OPEN;
3326 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3327 ifsta->auth_alg);
3328 ifsta->auth_transaction = -1;
3329 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3330 ifsta->auth_tries = ifsta->assoc_tries = 0;
3331 netif_carrier_off(dev);
3332}
3333
3334
3335void ieee80211_sta_req_auth(struct net_device *dev,
3336 struct ieee80211_if_sta *ifsta)
3337{
3338 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3339 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3340
3341 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3342 return;
3343
3344 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3345 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3346 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3347 IEEE80211_STA_AUTO_SSID_SEL))) {
3348 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3349 queue_work(local->hw.workqueue, &ifsta->work);
3350 }
3351}
3352
3353static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3354 const char *ssid, int ssid_len)
3355{
3356 int tmp, hidden_ssid;
3357
3358 if (ssid_len == ifsta->ssid_len &&
3359 !memcmp(ifsta->ssid, ssid, ssid_len))
3360 return 1;
3361
3362 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3363 return 0;
3364
3365 hidden_ssid = 1;
3366 tmp = ssid_len;
3367 while (tmp--) {
3368 if (ssid[tmp] != '\0') {
3369 hidden_ssid = 0;
3370 break;
3371 }
3372 }
3373
3374 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3375 return 1;
3376
3377 if (ssid_len == 1 && ssid[0] == ' ')
3378 return 1;
3379
3380 return 0;
3381}
3382
3383static int ieee80211_sta_config_auth(struct net_device *dev,
3384 struct ieee80211_if_sta *ifsta)
3385{
3386 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3387 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3388 struct ieee80211_sta_bss *bss, *selected = NULL;
3389 int top_rssi = 0, freq;
3390
3391 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3392 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
3393 ifsta->state = IEEE80211_AUTHENTICATE;
3394 ieee80211_sta_reset_auth(dev, ifsta);
3395 return 0;
3396 }
3397
3398 spin_lock_bh(&local->sta_bss_lock);
3399 freq = local->oper_channel->center_freq;
3400 list_for_each_entry(bss, &local->sta_bss_list, list) {
3401 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3402 continue;
3403
3404 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3405 !!sdata->default_key)
3406 continue;
3407
3408 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3409 bss->freq != freq)
3410 continue;
3411
3412 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3413 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3414 continue;
3415
3416 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3417 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3418 continue;
3419
3420 if (!selected || top_rssi < bss->rssi) {
3421 selected = bss;
3422 top_rssi = bss->rssi;
3423 }
3424 }
3425 if (selected)
3426 atomic_inc(&selected->users);
3427 spin_unlock_bh(&local->sta_bss_lock);
3428
3429 if (selected) {
3430 ieee80211_set_freq(local, selected->freq);
3431 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3432 ieee80211_sta_set_ssid(dev, selected->ssid,
3433 selected->ssid_len);
3434 ieee80211_sta_set_bssid(dev, selected->bssid);
3435 ieee80211_sta_def_wmm_params(dev, selected, 0);
3436 ieee80211_rx_bss_put(dev, selected);
3437 ifsta->state = IEEE80211_AUTHENTICATE;
3438 ieee80211_sta_reset_auth(dev, ifsta);
3439 return 0;
3440 } else {
3441 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3442 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3443 ieee80211_sta_start_scan(dev, NULL, 0);
3444 else
3445 ieee80211_sta_start_scan(dev, ifsta->ssid,
3446 ifsta->ssid_len);
3447 ifsta->state = IEEE80211_AUTHENTICATE;
3448 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3449 } else
3450 ifsta->state = IEEE80211_DISABLED;
3451 }
3452 return -1;
3453}
3454
3455
3456static int ieee80211_sta_create_ibss(struct net_device *dev,
3457 struct ieee80211_if_sta *ifsta)
3458{
3459 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3460 struct ieee80211_sta_bss *bss;
3461 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3462 struct ieee80211_supported_band *sband;
3463 u8 bssid[ETH_ALEN], *pos;
3464 int i;
3465 DECLARE_MAC_BUF(mac);
3466
3467#if 0
3468 /* Easier testing, use fixed BSSID. */
3469 memset(bssid, 0xfe, ETH_ALEN);
3470#else
3471 /* Generate random, not broadcast, locally administered BSSID. Mix in
3472 * own MAC address to make sure that devices that do not have proper
3473 * random number generator get different BSSID. */
3474 get_random_bytes(bssid, ETH_ALEN);
3475 for (i = 0; i < ETH_ALEN; i++)
3476 bssid[i] ^= dev->dev_addr[i];
3477 bssid[0] &= ~0x01;
3478 bssid[0] |= 0x02;
3479#endif
3480
3481 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3482 dev->name, print_mac(mac, bssid));
3483
3484 bss = ieee80211_rx_bss_add(dev, bssid,
3485 local->hw.conf.channel->center_freq,
3486 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3487 if (!bss)
3488 return -ENOMEM;
3489
3490 bss->band = local->hw.conf.channel->band;
3491 sband = local->hw.wiphy->bands[bss->band];
3492
3493 if (local->hw.conf.beacon_int == 0)
3494 local->hw.conf.beacon_int = 10000;
3495 bss->beacon_int = local->hw.conf.beacon_int;
3496 bss->last_update = jiffies;
3497 bss->capability = WLAN_CAPABILITY_IBSS;
3498 if (sdata->default_key) {
3499 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3500 } else
3501 sdata->drop_unencrypted = 0;
3502 bss->supp_rates_len = sband->n_bitrates;
3503 pos = bss->supp_rates;
3504 for (i = 0; i < sband->n_bitrates; i++) {
3505 int rate = sband->bitrates[i].bitrate;
3506 *pos++ = (u8) (rate / 5);
3507 }
3508
3509 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3510}
3511
3512
3513static int ieee80211_sta_find_ibss(struct net_device *dev,
3514 struct ieee80211_if_sta *ifsta)
3515{
3516 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3517 struct ieee80211_sta_bss *bss;
3518 int found = 0;
3519 u8 bssid[ETH_ALEN];
3520 int active_ibss;
3521 DECLARE_MAC_BUF(mac);
3522 DECLARE_MAC_BUF(mac2);
3523
3524 if (ifsta->ssid_len == 0)
3525 return -EINVAL;
3526
3527 active_ibss = ieee80211_sta_active_ibss(dev);
3528#ifdef CONFIG_MAC80211_IBSS_DEBUG
3529 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3530 dev->name, active_ibss);
3531#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3532 spin_lock_bh(&local->sta_bss_lock);
3533 list_for_each_entry(bss, &local->sta_bss_list, list) {
3534 if (ifsta->ssid_len != bss->ssid_len ||
3535 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3536 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3537 continue;
3538#ifdef CONFIG_MAC80211_IBSS_DEBUG
3539 printk(KERN_DEBUG " bssid=%s found\n",
3540 print_mac(mac, bss->bssid));
3541#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3542 memcpy(bssid, bss->bssid, ETH_ALEN);
3543 found = 1;
3544 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3545 break;
3546 }
3547 spin_unlock_bh(&local->sta_bss_lock);
3548
3549#ifdef CONFIG_MAC80211_IBSS_DEBUG
3550 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3551 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3552#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3553 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3554 (bss = ieee80211_rx_bss_get(dev, bssid,
3555 local->hw.conf.channel->center_freq,
3556 ifsta->ssid, ifsta->ssid_len))) {
3557 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3558 " based on configured SSID\n",
3559 dev->name, print_mac(mac, bssid));
3560 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3561 }
3562#ifdef CONFIG_MAC80211_IBSS_DEBUG
3563 printk(KERN_DEBUG " did not try to join ibss\n");
3564#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3565
3566 /* Selected IBSS not found in current scan results - try to scan */
3567 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3568 !ieee80211_sta_active_ibss(dev)) {
3569 mod_timer(&ifsta->timer, jiffies +
3570 IEEE80211_IBSS_MERGE_INTERVAL);
3571 } else if (time_after(jiffies, local->last_scan_completed +
3572 IEEE80211_SCAN_INTERVAL)) {
3573 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3574 "join\n", dev->name);
3575 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3576 ifsta->ssid_len);
3577 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3578 int interval = IEEE80211_SCAN_INTERVAL;
3579
3580 if (time_after(jiffies, ifsta->ibss_join_req +
3581 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3582 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3583 (!(local->oper_channel->flags &
3584 IEEE80211_CHAN_NO_IBSS)))
3585 return ieee80211_sta_create_ibss(dev, ifsta);
3586 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3587 printk(KERN_DEBUG "%s: IBSS not allowed on"
3588 " %d MHz\n", dev->name,
3589 local->hw.conf.channel->center_freq);
3590 }
3591
3592 /* No IBSS found - decrease scan interval and continue
3593 * scanning. */
3594 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3595 }
3596
3597 ifsta->state = IEEE80211_IBSS_SEARCH;
3598 mod_timer(&ifsta->timer, jiffies + interval);
3599 return 0;
3600 }
3601
3602 return 0;
3603}
3604
3605
3606int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3607{
3608 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3609 struct ieee80211_if_sta *ifsta;
3610
3611 if (len > IEEE80211_MAX_SSID_LEN)
3612 return -EINVAL;
3613
3614 ifsta = &sdata->u.sta;
3615
3616 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3617 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3618 memcpy(ifsta->ssid, ssid, len);
3619 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3620 ifsta->ssid_len = len;
3621
3622 if (len)
3623 ifsta->flags |= IEEE80211_STA_SSID_SET;
3624 else
3625 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3626 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3627 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3628 ifsta->ibss_join_req = jiffies;
3629 ifsta->state = IEEE80211_IBSS_SEARCH;
3630 return ieee80211_sta_find_ibss(dev, ifsta);
3631 }
3632 return 0;
3633}
3634
3635
3636int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3637{
3638 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3639 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3640 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3641 *len = ifsta->ssid_len;
3642 return 0;
3643}
3644
3645
3646int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3647{
3648 struct ieee80211_sub_if_data *sdata;
3649 struct ieee80211_if_sta *ifsta;
3650 int res;
3651
3652 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3653 ifsta = &sdata->u.sta;
3654
3655 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3656 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3657 res = ieee80211_if_config(dev);
3658 if (res) {
3659 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3660 "the low-level driver\n", dev->name);
3661 return res;
3662 }
3663 }
3664
3665 if (is_valid_ether_addr(bssid))
3666 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3667 else
3668 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3669
3670 return 0;
3671}
3672
3673
3674static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3675 struct ieee80211_sub_if_data *sdata,
3676 int powersave)
3677{
3678 struct sk_buff *skb;
3679 struct ieee80211_hdr *nullfunc;
3680 u16 fc;
3681
3682 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3683 if (!skb) {
3684 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3685 "frame\n", sdata->dev->name);
3686 return;
3687 }
3688 skb_reserve(skb, local->hw.extra_tx_headroom);
3689
3690 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3691 memset(nullfunc, 0, 24);
3692 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3693 IEEE80211_FCTL_TODS;
3694 if (powersave)
3695 fc |= IEEE80211_FCTL_PM;
3696 nullfunc->frame_control = cpu_to_le16(fc);
3697 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3698 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3699 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3700
3701 ieee80211_sta_tx(sdata->dev, skb, 0);
3702}
3703
3704
3705static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3706{
3707 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3708 ieee80211_vif_is_mesh(&sdata->vif))
3709 ieee80211_sta_timer((unsigned long)sdata);
3710}
3711
3712void ieee80211_scan_completed(struct ieee80211_hw *hw)
3713{
3714 struct ieee80211_local *local = hw_to_local(hw);
3715 struct net_device *dev = local->scan_dev;
3716 struct ieee80211_sub_if_data *sdata;
3717 union iwreq_data wrqu;
3718
3719 local->last_scan_completed = jiffies;
3720 memset(&wrqu, 0, sizeof(wrqu));
3721 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3722
3723 if (local->sta_hw_scanning) {
3724 local->sta_hw_scanning = 0;
3725 if (ieee80211_hw_config(local))
3726 printk(KERN_DEBUG "%s: failed to restore operational "
3727 "channel after scan\n", dev->name);
3728 /* Restart STA timer for HW scan case */
3729 rcu_read_lock();
3730 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3731 ieee80211_restart_sta_timer(sdata);
3732 rcu_read_unlock();
3733
3734 goto done;
3735 }
3736
3737 local->sta_sw_scanning = 0;
3738 if (ieee80211_hw_config(local))
3739 printk(KERN_DEBUG "%s: failed to restore operational "
3740 "channel after scan\n", dev->name);
3741
3742
3743 netif_tx_lock_bh(local->mdev);
3744 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3745 local->ops->configure_filter(local_to_hw(local),
3746 FIF_BCN_PRBRESP_PROMISC,
3747 &local->filter_flags,
3748 local->mdev->mc_count,
3749 local->mdev->mc_list);
3750
3751 netif_tx_unlock_bh(local->mdev);
3752
3753 rcu_read_lock();
3754 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3755
3756 /* No need to wake the master device. */
3757 if (sdata->dev == local->mdev)
3758 continue;
3759
3760 /* Tell AP we're back */
3761 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3762 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3763 ieee80211_send_nullfunc(local, sdata, 0);
3764
3765 ieee80211_restart_sta_timer(sdata);
3766
3767 netif_wake_queue(sdata->dev);
3768 }
3769 rcu_read_unlock();
3770
3771done:
3772 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3773 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3774 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3775 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3776 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3777 !ieee80211_sta_active_ibss(dev)))
3778 ieee80211_sta_find_ibss(dev, ifsta);
3779 }
3780}
3781EXPORT_SYMBOL(ieee80211_scan_completed);
3782
3783void ieee80211_sta_scan_work(struct work_struct *work)
3784{
3785 struct ieee80211_local *local =
3786 container_of(work, struct ieee80211_local, scan_work.work);
3787 struct net_device *dev = local->scan_dev;
3788 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3789 struct ieee80211_supported_band *sband;
3790 struct ieee80211_channel *chan;
3791 int skip;
3792 unsigned long next_delay = 0;
3793
3794 if (!local->sta_sw_scanning)
3795 return;
3796
3797 switch (local->scan_state) {
3798 case SCAN_SET_CHANNEL:
3799 /*
3800 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3801 * after we successfully scanned the last channel of the last
3802 * band (and the last band is supported by the hw)
3803 */
3804 if (local->scan_band < IEEE80211_NUM_BANDS)
3805 sband = local->hw.wiphy->bands[local->scan_band];
3806 else
3807 sband = NULL;
3808
3809 /*
3810 * If we are at an unsupported band and have more bands
3811 * left to scan, advance to the next supported one.
3812 */
3813 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3814 local->scan_band++;
3815 sband = local->hw.wiphy->bands[local->scan_band];
3816 local->scan_channel_idx = 0;
3817 }
3818
3819 /* if no more bands/channels left, complete scan */
3820 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3821 ieee80211_scan_completed(local_to_hw(local));
3822 return;
3823 }
3824 skip = 0;
3825 chan = &sband->channels[local->scan_channel_idx];
3826
3827 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3828 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3829 chan->flags & IEEE80211_CHAN_NO_IBSS))
3830 skip = 1;
3831
3832 if (!skip) {
3833 local->scan_channel = chan;
3834 if (ieee80211_hw_config(local)) {
3835 printk(KERN_DEBUG "%s: failed to set freq to "
3836 "%d MHz for scan\n", dev->name,
3837 chan->center_freq);
3838 skip = 1;
3839 }
3840 }
3841
3842 /* advance state machine to next channel/band */
3843 local->scan_channel_idx++;
3844 if (local->scan_channel_idx >= sband->n_channels) {
3845 /*
3846 * scan_band may end up == IEEE80211_NUM_BANDS, but
3847 * we'll catch that case above and complete the scan
3848 * if that is the case.
3849 */
3850 local->scan_band++;
3851 local->scan_channel_idx = 0;
3852 }
3853
3854 if (skip)
3855 break;
3856
3857 next_delay = IEEE80211_PROBE_DELAY +
3858 usecs_to_jiffies(local->hw.channel_change_time);
3859 local->scan_state = SCAN_SEND_PROBE;
3860 break;
3861 case SCAN_SEND_PROBE:
3862 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3863 local->scan_state = SCAN_SET_CHANNEL;
3864
3865 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3866 break;
3867 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3868 local->scan_ssid_len);
3869 next_delay = IEEE80211_CHANNEL_TIME;
3870 break;
3871 }
3872
3873 if (local->sta_sw_scanning)
3874 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3875 next_delay);
3876}
3877
3878
3879static int ieee80211_sta_start_scan(struct net_device *dev,
3880 u8 *ssid, size_t ssid_len)
3881{
3882 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3883 struct ieee80211_sub_if_data *sdata;
3884
3885 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3886 return -EINVAL;
3887
3888 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3889 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3890 * BSSID: MACAddress
3891 * SSID
3892 * ScanType: ACTIVE, PASSIVE
3893 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3894 * a Probe frame during active scanning
3895 * ChannelList
3896 * MinChannelTime (>= ProbeDelay), in TU
3897 * MaxChannelTime: (>= MinChannelTime), in TU
3898 */
3899
3900 /* MLME-SCAN.confirm
3901 * BSSDescriptionSet
3902 * ResultCode: SUCCESS, INVALID_PARAMETERS
3903 */
3904
3905 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3906 if (local->scan_dev == dev)
3907 return 0;
3908 return -EBUSY;
3909 }
3910
3911 if (local->ops->hw_scan) {
3912 int rc = local->ops->hw_scan(local_to_hw(local),
3913 ssid, ssid_len);
3914 if (!rc) {
3915 local->sta_hw_scanning = 1;
3916 local->scan_dev = dev;
3917 }
3918 return rc;
3919 }
3920
3921 local->sta_sw_scanning = 1;
3922
3923 rcu_read_lock();
3924 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3925
3926 /* Don't stop the master interface, otherwise we can't transmit
3927 * probes! */
3928 if (sdata->dev == local->mdev)
3929 continue;
3930
3931 netif_stop_queue(sdata->dev);
3932 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3933 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3934 ieee80211_send_nullfunc(local, sdata, 1);
3935 }
3936 rcu_read_unlock();
3937
3938 if (ssid) {
3939 local->scan_ssid_len = ssid_len;
3940 memcpy(local->scan_ssid, ssid, ssid_len);
3941 } else
3942 local->scan_ssid_len = 0;
3943 local->scan_state = SCAN_SET_CHANNEL;
3944 local->scan_channel_idx = 0;
3945 local->scan_band = IEEE80211_BAND_2GHZ;
3946 local->scan_dev = dev;
3947
3948 netif_tx_lock_bh(local->mdev);
3949 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3950 local->ops->configure_filter(local_to_hw(local),
3951 FIF_BCN_PRBRESP_PROMISC,
3952 &local->filter_flags,
3953 local->mdev->mc_count,
3954 local->mdev->mc_list);
3955 netif_tx_unlock_bh(local->mdev);
3956
3957 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3958 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3959 IEEE80211_CHANNEL_TIME);
3960
3961 return 0;
3962}
3963
3964
3965int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3966{
3967 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3968 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3969 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3970
3971 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3972 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3973
3974 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3975 if (local->scan_dev == dev)
3976 return 0;
3977 return -EBUSY;
3978 }
3979
3980 ifsta->scan_ssid_len = ssid_len;
3981 if (ssid_len)
3982 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3983 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3984 queue_work(local->hw.workqueue, &ifsta->work);
3985 return 0;
3986}
3987
3988static char *
3989ieee80211_sta_scan_result(struct net_device *dev,
3990 struct ieee80211_sta_bss *bss,
3991 char *current_ev, char *end_buf)
3992{
3993 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3994 struct iw_event iwe;
3995
3996 if (time_after(jiffies,
3997 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3998 return current_ev;
3999
4000 memset(&iwe, 0, sizeof(iwe));
4001 iwe.cmd = SIOCGIWAP;
4002 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4003 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4004 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4005 IW_EV_ADDR_LEN);
4006
4007 memset(&iwe, 0, sizeof(iwe));
4008 iwe.cmd = SIOCGIWESSID;
4009 if (bss_mesh_cfg(bss)) {
4010 iwe.u.data.length = bss_mesh_id_len(bss);
4011 iwe.u.data.flags = 1;
4012 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4013 bss_mesh_id(bss));
4014 } else {
4015 iwe.u.data.length = bss->ssid_len;
4016 iwe.u.data.flags = 1;
4017 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4018 bss->ssid);
4019 }
4020
4021 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4022 || bss_mesh_cfg(bss)) {
4023 memset(&iwe, 0, sizeof(iwe));
4024 iwe.cmd = SIOCGIWMODE;
4025 if (bss_mesh_cfg(bss))
4026 iwe.u.mode = IW_MODE_MESH;
4027 else if (bss->capability & WLAN_CAPABILITY_ESS)
4028 iwe.u.mode = IW_MODE_MASTER;
4029 else
4030 iwe.u.mode = IW_MODE_ADHOC;
4031 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4032 IW_EV_UINT_LEN);
4033 }
4034
4035 memset(&iwe, 0, sizeof(iwe));
4036 iwe.cmd = SIOCGIWFREQ;
4037 iwe.u.freq.m = bss->freq;
4038 iwe.u.freq.e = 6;
4039 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4040 IW_EV_FREQ_LEN);
4041
4042 memset(&iwe, 0, sizeof(iwe));
4043 iwe.cmd = SIOCGIWFREQ;
4044 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4045 iwe.u.freq.e = 0;
4046 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4047 IW_EV_FREQ_LEN);
4048
4049 memset(&iwe, 0, sizeof(iwe));
4050 iwe.cmd = IWEVQUAL;
4051 iwe.u.qual.qual = bss->signal;
4052 iwe.u.qual.level = bss->rssi;
4053 iwe.u.qual.noise = bss->noise;
4054 iwe.u.qual.updated = local->wstats_flags;
4055 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4056 IW_EV_QUAL_LEN);
4057
4058 memset(&iwe, 0, sizeof(iwe));
4059 iwe.cmd = SIOCGIWENCODE;
4060 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4061 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4062 else
4063 iwe.u.data.flags = IW_ENCODE_DISABLED;
4064 iwe.u.data.length = 0;
4065 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
4066
4067 if (bss && bss->wpa_ie) {
4068 memset(&iwe, 0, sizeof(iwe));
4069 iwe.cmd = IWEVGENIE;
4070 iwe.u.data.length = bss->wpa_ie_len;
4071 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4072 bss->wpa_ie);
4073 }
4074
4075 if (bss && bss->rsn_ie) {
4076 memset(&iwe, 0, sizeof(iwe));
4077 iwe.cmd = IWEVGENIE;
4078 iwe.u.data.length = bss->rsn_ie_len;
4079 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4080 bss->rsn_ie);
4081 }
4082
4083 if (bss && bss->supp_rates_len > 0) {
4084 /* display all supported rates in readable format */
4085 char *p = current_ev + IW_EV_LCP_LEN;
4086 int i;
4087
4088 memset(&iwe, 0, sizeof(iwe));
4089 iwe.cmd = SIOCGIWRATE;
4090 /* Those two flags are ignored... */
4091 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4092
4093 for (i = 0; i < bss->supp_rates_len; i++) {
4094 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4095 0x7f) * 500000);
4096 p = iwe_stream_add_value(current_ev, p,
4097 end_buf, &iwe, IW_EV_PARAM_LEN);
4098 }
4099 current_ev = p;
4100 }
4101
4102 if (bss) {
4103 char *buf;
4104 buf = kmalloc(30, GFP_ATOMIC);
4105 if (buf) {
4106 memset(&iwe, 0, sizeof(iwe));
4107 iwe.cmd = IWEVCUSTOM;
4108 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4109 iwe.u.data.length = strlen(buf);
4110 current_ev = iwe_stream_add_point(current_ev, end_buf,
4111 &iwe, buf);
4112 kfree(buf);
4113 }
4114 }
4115
4116 if (bss_mesh_cfg(bss)) {
4117 char *buf;
4118 u8 *cfg = bss_mesh_cfg(bss);
4119 buf = kmalloc(50, GFP_ATOMIC);
4120 if (buf) {
4121 memset(&iwe, 0, sizeof(iwe));
4122 iwe.cmd = IWEVCUSTOM;
4123 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4124 iwe.u.data.length = strlen(buf);
4125 current_ev = iwe_stream_add_point(current_ev, end_buf,
4126 &iwe, buf);
4127 sprintf(buf, "Path Selection Protocol ID: "
4128 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4129 cfg[4]);
4130 iwe.u.data.length = strlen(buf);
4131 current_ev = iwe_stream_add_point(current_ev, end_buf,
4132 &iwe, buf);
4133 sprintf(buf, "Path Selection Metric ID: "
4134 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4135 cfg[8]);
4136 iwe.u.data.length = strlen(buf);
4137 current_ev = iwe_stream_add_point(current_ev, end_buf,
4138 &iwe, buf);
4139 sprintf(buf, "Congestion Control Mode ID: "
4140 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4141 cfg[11], cfg[12]);
4142 iwe.u.data.length = strlen(buf);
4143 current_ev = iwe_stream_add_point(current_ev, end_buf,
4144 &iwe, buf);
4145 sprintf(buf, "Channel Precedence: "
4146 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4147 cfg[15], cfg[16]);
4148 iwe.u.data.length = strlen(buf);
4149 current_ev = iwe_stream_add_point(current_ev, end_buf,
4150 &iwe, buf);
4151 kfree(buf);
4152 }
4153 }
4154
4155 return current_ev;
4156}
4157
4158
4159int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4160{
4161 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4162 char *current_ev = buf;
4163 char *end_buf = buf + len;
4164 struct ieee80211_sta_bss *bss;
4165
4166 spin_lock_bh(&local->sta_bss_lock);
4167 list_for_each_entry(bss, &local->sta_bss_list, list) {
4168 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4169 spin_unlock_bh(&local->sta_bss_lock);
4170 return -E2BIG;
4171 }
4172 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4173 end_buf);
4174 }
4175 spin_unlock_bh(&local->sta_bss_lock);
4176 return current_ev - buf;
4177}
4178
4179
4180int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4181{
4182 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4183 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4184 kfree(ifsta->extra_ie);
4185 if (len == 0) {
4186 ifsta->extra_ie = NULL;
4187 ifsta->extra_ie_len = 0;
4188 return 0;
4189 }
4190 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4191 if (!ifsta->extra_ie) {
4192 ifsta->extra_ie_len = 0;
4193 return -ENOMEM;
4194 }
4195 memcpy(ifsta->extra_ie, ie, len);
4196 ifsta->extra_ie_len = len;
4197 return 0;
4198}
4199
4200
4201struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
4202 struct sk_buff *skb, u8 *bssid,
4203 u8 *addr)
4204{
4205 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4206 struct sta_info *sta;
4207 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4208 DECLARE_MAC_BUF(mac);
4209
4210 /* TODO: Could consider removing the least recently used entry and
4211 * allow new one to be added. */
4212 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4213 if (net_ratelimit()) {
4214 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4215 "entry %s\n", dev->name, print_mac(mac, addr));
4216 }
4217 return NULL;
4218 }
4219
4220 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4221 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4222
4223 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4224 if (!sta)
4225 return NULL;
4226
4227 sta->flags |= WLAN_STA_AUTHORIZED;
4228
4229 sta->supp_rates[local->hw.conf.channel->band] =
4230 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
4231
4232 rate_control_rate_init(sta, local);
4233
4234 if (sta_info_insert(sta))
4235 return NULL;
4236
4237 return sta;
4238}
4239
4240
4241int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4242{
4243 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4244 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4245
4246 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4247 dev->name, reason);
4248
4249 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4250 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4251 return -EINVAL;
4252
4253 ieee80211_send_deauth(dev, ifsta, reason);
4254 ieee80211_set_disassoc(dev, ifsta, 1);
4255 return 0;
4256}
4257
4258
4259int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4260{
4261 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4262 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4263
4264 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4265 dev->name, reason);
4266
4267 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4268 return -EINVAL;
4269
4270 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4271 return -1;
4272
4273 ieee80211_send_disassoc(dev, ifsta, reason);
4274 ieee80211_set_disassoc(dev, ifsta, 0);
4275 return 0;
4276}
4277
4278void ieee80211_notify_mac(struct ieee80211_hw *hw,
4279 enum ieee80211_notification_types notif_type)
4280{
4281 struct ieee80211_local *local = hw_to_local(hw);
4282 struct ieee80211_sub_if_data *sdata;
4283
4284 switch (notif_type) {
4285 case IEEE80211_NOTIFY_RE_ASSOC:
4286 rcu_read_lock();
4287 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4288
4289 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4290 ieee80211_sta_req_auth(sdata->dev,
4291 &sdata->u.sta);
4292 }
4293
4294 }
4295 rcu_read_unlock();
4296 break;
4297 }
4298}
4299EXPORT_SYMBOL(ieee80211_notify_mac);
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-01 06:43:46 -0500